Full opinion text
WOODLOCK, District Judge. The Commonwealth of Massachusetts and two of its registered voters bring this action challenging the manner by which the Congress of the United States has apportioned the 435 seats in the United States House of Representatives. The plaintiffs contend 1) that the method for allocating House seats among the 50 states violated the constitutionally grounded principle of “one person, one vote” (the “apportionment claim”); and 2) that the method used in the 1990 census for counting federal employees serving overseas was improper (the “overseas census claims”). The plaintiffs seek declaratory relief and an injunction directing the defendants — the executive and legislative officers variously charged with overseeing the conduct of the census, the methodology for the allocation of congressional seats, and the certification of the allocation — to reallocate the seats apportioned to the several states as a consequence of the 1990 census. The animating concern which prompted this litigation was the loss by Massachusetts of one of its current eleven congressional seats as a result of the congressional reapportionment process necessitated by the 1990 census. The parties have stipulated (A) that if the plaintiffs prevail on their apportionment claim, Massachusetts will continue to have eleven seats in the House of Representatives while the State of Oklahoma will lose one of the six seats it has been allocated under the challenged apportionment methodology; or, alternatively, (B) that if the plaintiffs prevail on their overseas census claims, Massachusetts will continue to have eleven seats in the House of Representatives while the State of Washington will lose one of the nine seats it has received under the challenged census methodology. At issue is not merely the size of the Massachusetts delegation in the House of Representatives, but also the relative strength of the Massachusetts voice in the selection of the president through the electoral college, where a state’s share of the 535 electors is “equal to the whole Number of Senators and Representatives to which the State may be entitled in the Congress.” U.S. Const., art. II, § 1, cl. 2. The case has been presented to us by cross motions for summary judgment, supported by a stipulation of facts and affidavits. The parties agree that there is no genuine issue of material fact in dispute. While we conclude that the congressional judgment regarding the allocation of congressional seats was not violative of the Constitution and therefore reject plaintiffs’ apportionment claim on the merits, we also conclude that the administrative judgment regarding the method of counting overseas personnel in the 1990 census was arbitrary and capricious, and an abuse of discretion in violation of the Administrative Procedure Act. Consequently, conditioned upon timely action by the defendant Commonwealth of Massachusetts, we will order the defendants to recertify state entitlements to seats in the House of Representatives. In order to reach the merits of the case we have had to pass through a jurisdictional and justiciability thicket. Part of this thicket came with the territory, which required us to explore the breadth of the jurisdiction conferred by the three-judge court statute. The other part was cultivated by the defendants and the State of Washington as amicus curiae, who variously raised standing, the indispensability of absent parties, and the political question doctrine as justiciability impediments to plaintiffs’ claims. Our passage through the several parts of the thicket helps to stake out the merits of the claims at the substantive heartland of the case. Accordingly, we turn first to a report of our passage before discussing the merits of the claims. I THE JURISDICTION AND JUSTICIABILITY THICKET A. THE JURISDICTION OF THE THREE-JUDGE COURT Congress has mandated that “[a] district court of three judges shall be convened ... when an action is filed challenging the constitutionality of the apportionment of congressional districts.” 28 U.S.C. § 2284(a). Section 2284(b)(1) calls for the convening of the three-judge court “[ujpon the filing of a request for three judges.” None of the parties, however, initially filed a request for the convening of a three-judge court in this action. Upon prompting by the single judge to whom this case was initially assigned and after a ruling by the United States District Court for the District of Montana before which a similar challenge to the congressional method of apportioning congressional districts among the states was mounted, Montana v. United States Dep’t of Commerce, (decision of single judge denying motion to dissolve three-judge court) 775 F.Supp. 1358, 1360 (D.Mont., 1991) (three-judge court opinion on merits affirming, inter alia, decision to convene three-judge court) prob. juris, noted, — U.S. -, 112 S.Ct. 656, 116 L.Ed.2d 747 (1991) (No. 91-860), the plaintiffs requested that a three-judge court be convened at least as to the apportionment claim. Plaintiffs also maintained at that time that the overseas census claims merited adjudication by a three-judge court. The defendants opposed the request. This three-judge court was convened without prejudice to the right to move to dissolve it. The defendants made such a motion. At oral argument, the defendants, recognizing that the Solicitor General had recently conceded in his submissions to the Supreme Court the propriety of the three-judge district court in the Montana litigation, Jurisdictional Statement, United States Dep’t of Commerce v. Montana, U.S. No. 91-860, at 25-28, abandoned their motion to dissolve this three-judge court as to the apportionment claim. The defendants, however, maintained that three-judge court consideration of the overseas census claims standing alone was inappropriate. The plaintiffs, while continuing their request for three-judge court treatment of the apportionment claim, expressed themselves at oral argument as indifferent on the question whether a three-judge court should dispose of the overseas census claims. Because we believe the question of the propriety of a three-judge court cannot be left to the variable dispositions of the parties but rather is a jurisdictional issue always open to review, we have undertaken our own independent analysis of the question. 1. The Apportionment Claim In their initial opposition to the convening of a three-judge court, even as to the apportionment claim, the defendants relied upon a distinction they perceived between intrastate and interstate apportionment disputes. Noting that until the Montana decision, all litigated challenges to the constitutionality of the apportionment of congressional districts had been directed at the decisions of state legislatures in the apportioning of districts within particular states, the defendants contended that interstate apportionment of districts could not have been within the contemplation of Congress when it revised the three-judge district court provisions in 1976. The distinction drawn by the defendants makes no material difference under § 2284. It is well recognized that the three-judge court procedure imposes heavy logistical demands on the federal judiciary. But the burden has been perceived necessary as a means for “the saving of state and federal statutes from improvident doom at the hands of a single judge.” MTM, Inc. v. Baxley, 420 U.S. 799, 804, 95 S.Ct. 1278, 1281, 43 L.Ed.2d 636 (1975) (per curiam). In no area is that concern more critical to the legitimacy of judicial decisionmaking than in the politically charged context of legislative reapportionment. And Congress made a deliberate decision to continue the application of three-judge court procedures to reapportionment cases when it narrowed the jurisdiction of those courts in 1976. The provisions for district courts sitting as a panel of three judges, one of whom must be a judge of the court of appeals— together with the opportunity for direct appeal to the Supreme Court — are useful in diminishing any perception that parochialism or partisanship will dominate decisions about the constitutionality of reapportionment. As the Senate Report supporting the narrowing of the three-judge court jurisdiction recognized, reapportionment matters “are of such importance that they ought to be heard by a three-judge court.” S.Rep. No. 204, 94th Cong., 1st Sess. 9 (1975) reprinted in 1976 U.S.Code Cong. & Admin.News 1988, 1996. That importance is not affected by whether it is a state or the federal legislature which has made the reapportionment decision under review. The language of the three-judge court statute makes no distinction between federal or state action regarding apportionment, and the relevant legislative history indicates Congress had no such distinction in mind. The Senate Report characterized the purpose of the amendments to three-judge court jurisdiction as an effort to “eliminate[ ] the requirement for three-judge courts in cases seeking to enjoin the enforcement of State or Federal laws on the grounds that they are unconstitutional, except in reapportionment cases.’’ Id. at 1-2 (emphasis supplied). Similarly, the House Report observed that the legislation would “continue the requirement for a three-judge court in cases challenging the constitutionality of any statute apportioning congressional districts.” H.R.Rep. No. 1379, 94th Cong., 2d Sess. 6 (1976) (emphasis supplied). In short, we are satisfied that the plaintiffs’ apportionment claim is a matter which Congress, through § 2284(a), has directed must be determined by a three-judge district court. 2. The Overseas Census Claims The plaintiffs’ overseas census claims present a different set of circumstances. We recognize that one of the plaintiffs’ census claims challenges the constitutionality of the manner by which the Secretary of Commerce chose to allocate overseas federal employees to individual states. That allegedly unconstitutional allocation, in turn, has become a basis upon which the Congress apportioned congressional seats among the states. It is unclear, however, whether the jurisdictional statute was intended to embrace this type of census claim as within the meaning of a challenge to the “constitutionality of the apportionment of congressional districts.” 28 U.S.C. § 2284(a). The methods of the census counts are precursors to the ultimate apportionment decisions, and an attack on those methods does not necessarily amount to a direct challenge to apportionment itself. As an historical matter, a number of similar census claims have been litigated before single district judges. However, only one court seems to have addressed directly the scope of the jurisdictional grant in § 2284(a) in analogous circumstances. In Federation for American Immigration Reform (“FAIR”) v. Klutznick, 486 F.Supp. 564 (D.D.C.1980), appeal dismissed, 447 U.S. 916, 100 S.Ct. 3005, 65 L.Ed.2d 1109 (1980), a three-judge district court was convened to consider plaintiff’s contention that the inclusion of illegal aliens in the 1980 census would be unconstitutional. While disposing of the case on other grounds, the FAIR court concluded that three-judge court jurisdiction was lacking for this indirect challenge to apportionment. Id. at 577-78. The commentators, however, would construe the statute more broadly. Professors Wright, Miller and Cooper suggest that § 2284(a) “ought to include all federal constitutional challenges that could result in a reapportionment.” 17 Wright, Miller & Cooper § 4235 at 606. See also Williams, The New Three-Judge Courts of Apportionment and Continuing Problems of Three-Judge Court Procedure, 65 Geo.L.J. 971, 979 (1977). The parties have stipulated here that, if plaintiffs’ constitutional overseas census claims are successful, a reapportionment would follow. But while the resulting reapportionment is a certainty in this case, it also looms as a possibility in virtually every census challenge. The construction given by the commentators to the scope of the “apportionment” language in § 2284(a) thus suggests that all census litigation is appropriate for three-judge court treatment. We very much doubt that was the congressional intent. We need not determine the precise scope of § 2284(a) in this case, however, because, even if the statute does not provide for a direct exercise of three-judge court jurisdiction over the overseas census claims standing alone, concerns for the conservation of judicial resources and the avoidance of liti-gative entropy counsel for three-judge court treatment in this instance. Plaintiffs’ overseas census claims do not stand alone but rather are coupled here to an apportionment claim plainly within the jurisdiction of this three-judge court. The direct apportionment claim and the overseas census claims concern the same general subject matter — the transformation of census apportionment counts into seats in the House of Representatives. They became ripe for decision at the same time and they were heard simultaneously by the three-judge court panel. For orderly review, our contemporaneous judgments regarding them should be appealed to the same court at the same time. While not directly governing the exercise of three-judge court jurisdiction, we believe that analogies to our exercise of three-judge court jurisdiction over the overseas census claims may be found in doctrines of supplemental jurisdiction applicable to district courts generally. The Supreme Court has recognized the power of a properly convened three-judge court to determine claims in the case that otherwise would be appropriate for a single district judge. See, e.g., Lake Carriers’ Ass’n v. MacMullan, 406 U.S. 498, 504 n. 6, 92 S.Ct. 1749, 1754 n. 6, 32 L.Ed.2d 257 (1972); Zemel v. Rusk, 381 U.S. 1, 5-6, 85 S.Ct. 1271, 1274-75, 14 L.Ed.2d 179 (1965); Florida Lime & Avocado Growers, Inc. v. Jacobsen, 362 U.S. 73, 85, 80 S.Ct. 568, 575, 4 L.Ed.2d 568 (1960). The considerations are similar to those which govern the exercise of pendent jurisdiction when, as here, the claims “are such that [plaintiffs] would ordinarily be expected to try them all in one judicial proceeding,” United Mine Workers v. Gibbs, 383 U.S. 715, 725, 86 S.Ct. 1130, 1138, 16 L.Ed.2d 218 (1966), and all claims are within the Article III jurisdiction of the district courts. While we recognize that in a strict sense the apportionment claim and the overseas census claims do not “derive from a common nucleus of operative fact,” cf. United Mine Workers v. Gibbs, 383 U.S. at 725, 86 S.Ct. at 1138, the values articulated in the jurisprudence of pendent jurisdiction are all present in this case. The “ ‘commonsense policy of pendent jurisdiction — the conservation of judicial energy and the avoidance of a multiplicity of litigation — ’ ” Newport Ltd. v. Sears Roebuck & Co., 941 F.2d 302, 308 n. 9 (5th Cir.1991) (citation omitted) reh. denied, 946 F.2d 893 (5th Cir.1991), petition for cert. filed, 60 U.S.L.W. 3482 (U.S. Dec. 23, 1991), applies equally here where time is of the essence as the nation prepares for the reapportionment of seats to be contested in the 1992 elections to the House of Representatives, and the parties have fully presented all aspects of the case at the same time to the three-judge court. Moreover, we see no benefit to be gained by atomizing avenues of appellate review. Any requirement that the overseas census claims be reviewed first in the Court of Appeals while the apportionment claim is available for direct appeal to the Supreme Court would only delay final resolution of the controversy by burdening yet another court without apparent meaningful value to ultimate consideration by the Supreme Court. Our reliance on this “commonsense” and policy-bound approach is further fortified by Congress’ decision in 1990 to codify the doctrines of pendent and ancillary jurisdiction in 28 U.S.C. § 1367. The new statute, which conflates the two theories into the unitary concept of “supplemental” jurisdiction, evidences congressional endorsement of jurisdictional rulings which subserve the efficient disposition of related claims. The statute provides that: in any civil action of which the district courts have original jurisdiction, the district courts shall have supplemental jurisdiction over all other claims that are so related to claims in the action within such original jurisdiction that they form part of the same case or controversy under Article III of the United States Constitution. 28 U.S.C. § 1367(a). Congress has thereby authorized supplemental jurisdiction “to the limits Article III of the Constitution permits.” 13 Wright, Miller & Cooper, Federal Practice and Procedure § 3567.3 at 35 (1991 Supp.). Section 1367 may be read to make the exercise of such jurisdiction virtually mandatory. Not only does the language of subsection (a) state that the district court “shall have” jurisdiction, subsection (c) strictly limits the circumstances in which a court may decline to exercise supplemental jurisdiction. None of those circumstances is applicable here. The same concerns for judicial economy and efficient resolution of disputes in a single forum counsel us to hear the overseas census claims in conjunc- tion with the apportionment claim over which we have clear three-judge court jurisdiction. Finally, because we are informed by the parties’ stipulation of facts that the determination of the overseas census claims will translate directly into a specific transfer of a congressional seat from Washington to Massachusetts, we are of the view that the policy considerations which led Congress to preserve the jurisdiction of three-judge courts over challenges to the constitutionality of congressional reapportionment are by analogy applicable here. By the same token the burden of three-judge court business upon either the District Courts or the Supreme Court in the aftermath of the 1976 amendment to the three-judge court statute is not so substantial as to require a hypertechnical restriction on the practical exercise of supplemental jurisdiction in this case. Thus, we have considered and determined the plaintiffs’ overseas census claims as a three-judge court. But see FAIR, 486 F.Supp. at 578 (outlining procedure by which single District Judge to whom case was assigned may separately certify same conclusion as that reached by the three-judge court). B. STANDING The defendants’ principal standing argument is essentially a subtle shell game. The defendants note that if the plaintiffs prevail on the overseas census claims, the injury of which they complain — the loss of a congressional seat by Massachusetts— will have been remedied. Thus, the defendants maintain, the plaintiffs cannot complain of an injury caused by the asserted unconstitutionality of the apportionment method for allocating seats among the states chosen by the Congress. The defendants’ argument is erected upon a stilted reading of the case law which imposes the unexceptional requirement that in order to establish standing a party must demonstrate that its alleged injuries “ ‘fairly can be traced to the challenged action.’ ” See generally Duke Power Co. v. Carolina Envtl. Study Group, Inc., 438 U.S. 59, 74, 98 S.Ct. 2620, 2631, 57 L.Ed.2d 595 (1978), (quoting Simon v. Eastern Kentucky Welfare Rights Org., 426 U.S. 26, 41, 96 S.Ct. 1917, 1925, 48 L.Ed.2d 450 (1976)). At bottom, this is a requirement that the relation between a plaintiff’s injury and a defendant’s action not be so attenuated as to raise a question whether judicial action to redress the injury would be merely advisory or gratuitous. We read this requirement as not dissimilar to the requirement of proximate cause in tort law. The mere fact that two independent causes may have contributed to an injury does not make one or the other any less a proximate cause. It is only when the various contributing causes are so diffuse and indeterminate that the requisite showing of causation is put in question. The District of Columbia Circuit has observed that: The weight of Supreme Court authority emphasizes that when numerous third parties and independent variables lead to an injury, the complainant has the burden of showing that but for the particular governmental action that he is challenging, the injury would abate. We have interpreted these cases to mean that petitioners “must show that the agency’s action is more than only one of the many factors whose relative influence may affect the third parties’ behavior.” Dellums v. United States Nuclear Regulartory Commission, 863 F.2d 968, 980 (D.C.Cir.1988) (citations omitted), (quoting Community for Creative Non-Violence v. Pierce, 814 F.2d 663, 669 (D.C.Cir.1987)). Where, as here, the separate causes are distinct and determinate and their influence is direct, the requisites of standing have been demonstrated as to both causes. To be sure, considerations of judicial economy and the preference for resolving non-constitutional issues before reaching issues of constitutional dimension may counsel in favor of addressing one asserted independent cause rather than the other initially. But that is not a standing impediment to the assertion of alternative claims for relief by a plaintiff. As an inferior court confronting two claims — both involving intense considerations of timeliness— which are positioned for direct review by the Supreme Court, we have a special obligation not to resolve this litigation piecemeal or seriatim. Rather, we must undertake to dispose of both claims in order to permit an orderly, timely, and complete resolution of plaintiffs’ claims. Defendants’ spurious standing defense is no bar to that type of resolution by this court. C. INDISPENSABILITY OF ABSENT PARTIES The State of Washington, which was granted amicus curiae status early in this action, belatedly filed a brief asserting that this case could not properly proceed because of its absence as an indispensable party. Washington, which, like all other states, was given notice of this litigation, observes that the parties have stipulated that if the plaintiffs’ overseas census claims are sustained, Washington will lose the one seat in the House of Representatives that Massachusetts will gain. Washington, however, has affirmatively chosen not to participate in this litigation as a party. Rather it asserts that it will not waive its sovereign immunity rights, that it has commenced its own litigation in the Western District of Washington to seek a declaration of these matters, and that in any event, the Supreme Court of the United States is the only forum available for the resolution of what is essentially an interstate dispute. We do not pause to consider whether Washington can be made a party to this proceeding; the present parties have not sought to bring her in and she has not sought to intervene. Those concerned with the defendants’ decisions are free to bring appropriate actions as they see fit in those jurisdictions where venue is proper. We are satisfied, moreover, that the Supreme Court is not the sole forum for resolution of reapportionment suits against federal defendants, at least unless two states having adverse interests are indispensable parties to the action. We turn, then, to the question whether Washington is an indispensable party to this proceeding in this forum. Washington stumbles at both hurdles to achieving indispensable party status. First, even assuming — as we will — that it is not feasible to join the State involuntarily because of her assertion of sovereign immunity, we cannot find her a necessary party under Fed.R.Civ.P. 19(a). See generally Pujol v. Shearson/American Express, Inc., 877 F.2d 132 (1st Cir.1989). The relief sought, proper recertification by the defendants of House of Representative seat entitlements for each state, will be complete even in Washington’s absence. More importantly, the interests of Washington, derived from the favorable census decisions of the defendants, are being fully and vigorously protected by the defendants themselves. And those defendants are no more subject to substantial risks of inconsistent judgments than is the federal government generally at any time it takes action of widespread consequence open to litigation throughout the nation. Moreover, even if Washington were to overcome the necessary party hurdle presented by Federal Rule of Civil Procedure 19(a), she is still unable to satisfy us that “in equity and good conscience” this action should be dismissed in her absence as a formal party under Rule 19(b). See generally Travelers Indemnity Co. v. Dingwell, 884 F.2d 629 (1st Cir.1989). As a practical matter we see no prejudice to Washington. As we have noted, the defendants are vigorously protecting her right to an additional House seat as a result of their actions. Her concerns have been voiced to us directly through her amicus status. The parties before us recognize that relief in her absence will be adequate. And the unpalatable alternative — given Washington’s refusal to participate in this forum — would be to remit the parties to the uncertainties and delay of proceeding in another forum, whether the Supreme Court through its questionable original jurisdiction, see supra note 10, or the Western District of Washington where Massachusetts would have to do what Washington will not do here: submit to a jurisdiction she otherwise objects to. We recognize that other courts have been sensitive to the need to protect the interests of all states in census litigation and to the dangers of distortion presented when only one state seeks a census adjustment. See generally Carey v. Klutznick, 653 F.2d 732 (2d Cir.1981), cert. denied, 455 U.S. 999, 102 S.Ct. 1630, 71 L.Ed.2d 866 (1982); Tucker v. United States Dep’t of Commerce, 135 F.R.D. 175 (N.D.Ill.1991), appeal pending, No. 91-2051 (7th Cir.). Unlike the procedures employed in those cases, all states here received notice of this litigation, and Washington actually presented her views directly to us. There was no impediment to the full and fair development of the facts as a result of Washington’s absence. Furthermore, when, as here, the issues are narrowly framed and their resolution can be understood in terms of a single national policy automatically having an equal effect on all states, any residual potential for unfairness is minimized. In short, we hold that the absence of the State of Washington — or any other state save Massachusetts — as a formal party to this case is not grounds to pretermit this proceeding. D. POLITICAL QUESTION In their briefing of this case, the defendants have invited us to employ what has quite accurately been termed the “amorphous and partly prudential doctrine of ‘political questions,’ ” Morgan v. United States, 801 F.2d 445, 447 (D.C.Cir.1986) (Scalia, J.), cert. denied, 480 U.S. 911, 107 S.Ct. 1359, 94 L.Ed.2d 529 (1987), as a device to avoid evaluating their apportionment actions. By this device, the defendants seek to have us abstain from judicial evaluation of the merits of the congressional choice of method for allocating seats in the House of Representatives. It appears, however, that the defendants do not argue for wholesale application of the political question doctrine in this context. In their briefing to the Supreme Court for the parallel Montana litigation, the defendants carefully asserted that they do not suggest that all matters concerning the apportionment of Representatives among the States are necessarily nonjusticiable ... But separation of powers principles — on which the political question doctrine rests — bar a court from setting aside Congress’s selection of a particular method of apportionment that is not demonstrably contrary to ... an explicit textual limitation on its discretion. Brief for Appellants, United States Dep’t of Commerce v. Montana, U.S. No. 91-860, at 34-35. We are less than entirely comfortable in relying upon the political question doctrine as an avoidance technique in the context of a reapportionment dispute. As a general proposition, we find considerable force in Professor Wechsler’s view that: the only proper judgment that may lead to an abstention from decision is that the Constitution has committed the determination of the issue to another agency of government than the courts. Difficult as it may be to make that judgment wisely, whatever factors may be rightly weighed in situations where the answer is not clear, what is involved is in itself an act of constitutional interpretation, to be judged by standards that should govern the interpretive process generally. Wechsler, Toward Neutral Principles of Constitutional Law, 73 Harv.L.Rev. 1, 9 (1959). See also Henkin, Is There a “Political Question”Doctrine?, 85 Yale L.J. 597 (1976); but see Mulhern, In Defense of the Political Question Doctrine, 137 U.Pa. L.Rev. 97 (1988). Nevertheless, the doctrine has been raised and not yet abandoned by the defendants as to the apportionment claim in this litigation. Moreover, “although the Supreme Court has rarely applied the doctrine in recent years, it has also declined the several opportunities available to dispatch it. We [must] honor the doctrine and apply it here.” Nixon v. United States, 938 F.2d 239, 246 (D.C.Cir.1991) (citations omitted), reh. denied, 1991 WL 119260, 1991 U.S.App. LEXIS 25391 (D.C.Cir.1991), petition for cert. filed, 60 U.S.L.W. 3376 (U.S. Nov. 4, 1991) (No. 91-740). The modern formulation of the political question doctrine is found in Baker v. Carr, 369 U.S. 186, 82 S.Ct. 691, 7 L.Ed.2d 663 (1962), where the Supreme Court held that a challenge presented to the apportionment of Tennessee’s General Assembly did not involve a nonjusticiable political question. 369 U.S. at 209, 82 S.Ct. at 705. Describing the doctrine as essentially a function of the separation of powers, the Court outlined six factors which may be observed in cases raising political question considerations: Prominent on the surface of any case held to involve a political question is found [1] a textually demonstrable constitutional commitment of the issue to a coordinate political department; or [2] a lack of judicially discoverable and manageable standards for resolving it; or [3] the impossibility of deciding without an initial policy determination of a kind clearly for nonjudicial discretion; or [4] the impossibility of a court’s undertaking independent resolution without expressing lack of the respect due coordinate branches of government; or [5] an unusual need for unquestioning adherence to a political decision already made; or [6] the potentiality of embarrassment from multifarious pronouncements by various departments on one question. Unless one of these formulations is inextricable from the case at bar, there should be no dismissal for nonjusticiability on the ground of a political question’s presence. The doctrine of which we treat is one of “political questions,” not one of “political cases.” The courts cannot reject as “no law suit” a bona fide controversy as to whether some action denominated “political” exceeds constitutional authority. The cases we have reviewed show the necessity for discriminating inquiry into the precise facts and posture of the particular case, and the impossibility of resolution by any semantic cataloguing. Id. at 217, 82 S.Ct. at 710. As our treatment of the merits in Section II of this opinion illustrates, inquiry into “the precise facts and posture” of the apportionment controversy satisfies us that, whatever the scope of the political question doctrine, it is not applicable here. None of the six factors identified in Baker v. Carr as relevant to the question whether the political question doctrine may render the apportionment claim nonjusticiable is implicated in this case. Our extended inquiry has satisfied us that those factors, whether considered individually or together, are not a bar to our resolution of this dispute on the merits. First, and most fundamentally, while it is clear that the language of the Constitution has been understood implicitly to make the principal Constitutional commitment on the issue of apportionment a matter for the Congress itself, there are other Constitutional directives regarding apportionment. Indeed, several different Constitutional provisions come into play. Some are explicit, for example, that the allocation of House seats to the states must be “according to their respective numbers.” U.S. Const., art. I, § 2, cl. 3, amended by U.S. Const, amend. XIV, § 2. Other constitutional requirements are implicit, for example the reading given by Wesberry v. Sanders, 376 U.S. 1, 84 S.Ct. 526, 11 L.Ed.2d 481 (1964) to Article I, Section 2, Clause 1 resulting in application of the “one person, one vote” principle to congressional redistricting. Congress must exercise its power over apportionment within the constraints of all the constitutional provisions which explicitly and implicitly govern congressional discretion in this area. And it is the responsibility of the courts to determine “whether Congress has chosen a. constitutionally permissible means of implementing that power.” Immigration & Naturalization Serv. v. Chadha, 462 U.S. 919, 940-41, 103 S.Ct. 2764, 2778-79, 77 L.Ed.2d 317 (1983). Second, the standards for resolving this issue are both judicially discoverable and judicially manageable. The implementation of the “one person, one vote” principle in the courts over the last 25 years has generated a substantial body of case law and judicial experience which can be brought to bear in making an evaluation of a congressional apportionment judgment. We note in this regard that the Supreme Court has recently found the most politically complex of reapportionment disputes, political gerrymandering, to be justiciable against a political question defense. See Davis v. Bandemer, 478 U.S. 109, 124, 106 S.Ct. 2797, 2806, 92 L.Ed.2d 85 (1986). Third, judicial review does not involve a policy determination of a kind inappropriate for judicial discretion. The issue of apportionment is not beyond the scope of judicial discretion. Of course, the courts can and should avoid extra-constitutional policy making determinations in this area. But evaluation of consonance with the Constitution is the kind of task which is clearly meant for judicial determination. Marbury v. Madison, 5 U.S. (1 Cranch) 137, 176, 2 L.Ed. 60 (1803) (“It is, emphatically, the province and duty of the judicial department, to say what the law is.”). Fourth, the rendition of judicial judgment in an apportionment case hardly constitutes an expression of lack of respect for Congress. The responsibilities of the judiciary under our structure of separated and balanced powers necessarily involve the “duty to review the constitutionality of Congressional enactments.” United States v. Munoz-Flores, 495 U.S. 385, 110 S.Ct. 1964, 1968-69,109 L.Ed.2d 384 (1990). There is no disrespect intended nor understood when the courts exercise their duty in this manner. Fifth, there is no unusual need for an unquestioning adherence to the decision previously made by Congress. Unlike national security matters, this is not an area of special sensitivity. The methodology for apportionment has been adjusted at various times throughout the history of the nation. Judicial examination to determine the constitutionality of such adjustments disturbs no need for repose in a decision previously made by Congress. Finally,- we do not deal with the embarrassment of multifarious pronouncements by various departments on one question. To be sure, the defendants have sought to restyle this issue as raising the danger of different initial opinions from different inferior federal courts. That is a danger that arises whenever a congressional enactment of nation-wide impact is open to examination in various nisi prius venues. The ultimate decision, however, will be that of the Supreme Court. And there will be no multiplicity of ultimate judgment in this area. There is, of course, the possibility that the ultimate judgment of the judicial department through the Supreme Court will be at odds with that of Congress. But, this is neither lack of respect for the Congress nor an embarrassment for the country. Rather, it reflects the bedrock determination that our system of government leaves to the judiciary the duty “to act as the ultimate interpreter of the Constitution.” Powell v. McCormack, 395 U.S. 486, 549, 89 S.Ct. 1944, 1978, 28 L.Ed.2d 491 (1969). II THE APPORTIONMENT CLAIM “Representatives shall be apportioned among the Several States according to their respective numbers ...” U.S. Const, art. I, § 2, cl. 3, amended by U.S. Const, amend. XIV, § 2. (emphasis supplied) Allocation of seats in the House of Representatives was at the heart of the bargain by which the several states agreed to enter into and remain a union. It was the issue central to successful drafting of the Constitution in 1787 and it was necessarily the subject of textual revision in 1868 during the rearrangement of the federal-state relationship brought about by the constitutional amendments of the Reconstruction era. Throughout the more than two centuries of this nation’s history, the Congress has been the ultimate custodian of power to implement the constitutional bargain reflected by the allocation of House seats. Indeed, it was not until the most recent reapportionment in 1991 that a challenge was mounted in the courts to the congressional stewardship of this responsibility. The merits of such a challenge must be addressed in light of the relevant constitutional text and its necessary implications, the historical treatment of the issue in Congress, and the development of the “one person, one vote” principle in the courts. A. THE RELEVANT CONSTITUTIONAL TEXT AND ITS IMPLICATIONS Article I, Section 2, Clause 1 of the Constitution provides that “The House of Representatives shall be composed of Members chosen every second Year by the People of the several States.” Clause 3 of Article I, section 2 provides for the allocation of those representatives among the several states. These provisions were the product of the Great Compromise, through which the divergent interests of the states were accommodated by providing a Senate in which each state was to be equally represented by two Senators, and a House of Representatives in which the representatives were to be “apportioned among the several States which may be included within this Union according to their respective Numbers.” Under clause 3, however, irrespective of their numbers, “each State shall have at Least one Representative.” As adopted, Article I, section 2, clause 3 embodied the “original sin” of the new American commonwealth by recognizing the peculiar institution of slavery through an indirect, almost invisible and, consequently, profoundly insidious reference. The “respective Numbers” of the states were required to “be determined by adding to the whole Number of free Persons, including those bound to Service for a Term of Years, and excluding Indians not taxed, three fifths of all other Persons.” (emphasis supplied). The treatment of slaves as three fifths of other persons was another aspect of the Great Compromise in which the slave and non-slave holding states fashioned an accommodation regarding the relative advantages and disadvantages which would accrue to the states from the counting of slaves in a state’s population. The textual revolution in the Constitution following the Civil War was directed in part to the treatment of the former slave populations in Article I, Section 2, Clause 3. Section 2 of the Fourteenth Amendment repudiated the fractionation of persons. Instead the amendment provided: “Representatives shall be apportioned among the several States according to their respective numbers, counting the whole number of persons in each State, excluding Indians not taxed.” As with all of the Fourteenth Amendment — including the equal protection clause of § 1 — Congress was given express enforcement powers over § 2 by § 5 of the amendment, which provided that “[t]he Congress shall have power to enforce, by appropriate legislation, the provisions of this article.” Although not express in clause 3 of Article I, section 2, two principles have been accepted without dispute as implicit in the text, the circumstances of its adoption and the structure of the Constitution. The first was that Congress itself would be responsible for the apportionment of the House of Representatives. As Justice Story observed: “the power to apportion representatives, after ... enumeration is made, is nowhere found among the express powers given to congress, but it has always been acted upon, as irresistibly flowing from the duty positively enjoined by the constitution.” Prigg v. Pennsylvania, 41 U.S. (16 Pet.) 589, 619, 10 L.Ed. 1060 (1842). The second was that congressional districts were to be assigned by state and no congressional district would be drawn with constituents from more than one state. The mathematics of apportioning representatives subjects the process to an irreducible condition. The division of any national population figure by the number of house seats to be apportioned, which is necessary for an allocation of representatives among the states, will, as a practical matter, invariably result in each state being allocated a whole number of representatives with a fraction left over. How to deal with the fractional remainder has been the historic challenge of the apportionment process as administered by Congress during the past two centuries. B. HISTORICAL DEVELOPMENT Not surprisingly, given the centrality of the apportionment issue to the bargain for a union, the method of apportionment has been contested vigorously throughout the nation’s history. Indeed, the method chosen by Congress after the first census in 1790 was the subject of the first presidential veto. President Washington, aware that the method championed by his Secretary of Treasury, Alexander Hamilton, and passed by the Congress was perceived to favor northern states at the expense of southern States, vetoed the measure after reference to two grounds which have shaped the discussion of congressional apportionment methodology ever since. The veto message expressed reservations first, about the lack of a clearly defined divisor or number of house seats to be apportioned and second, about the failure to delineate the number of persons each Representative would represent. The choice of divisor and the correlative delineation of the number of persons each representative would represent became the defining features for apportionments thereafter. Since the first census in 1790 Congress has employed four methods for apportionment. What has distinguished each has been the manner of disposing of the fractional remainders after a divisor is employed. In response to President Washington’s veto Congress adopted the Jefferson method — or “method of greatest divisors” — for the apportionments which followed the censuses of 1790 through 1830. Under the method of greatest divisors, the population of each state was divided by an identified number of persons per representative. The resulting whole number would be the size of the state’s congressional delegation and the fractional remainder would be disregarded. Thus, if the division yielded a result of 4.9, the state would still be entitled only to a congressional delegation of 4, just as would a state for which division yielded a result of 4.2. The precise result of the division, consisting of the whole number and the fractional remainder, is known as the state’s House seat “quota.” By continually increasing the size of the House of Representatives, certain regional tensions created by the greatest divisors (Jefferson) method were suppressed because no state had to confront a contracting number of representatives in its congressional delegation. Nevertheless, over time, the greatest divisors (Jefferson) method was seen to have a tendency to favor the larger states and following the 1830 census apportionment a number of other alternative methods were developed by New Englanders, a region perceived to have been disadvantaged by the greatest divisors (Jefferson) method. Former President John Quincy Adams, then sitting in the House of Representatives as a member of Congress from Massachusetts, proposed a method which was the mirror image of the greatest divisors (Jefferson) method. Under the smallest divisors (Adams) method, each state would receive an additional House seat for any fractional remainder no matter how small. Thus, if the division of each state’s population by the identified number of persons per representative yielded a result of 4.2, the state would be entitled to a congressional delegation of 5, just as would a state for which division yielded a result of 4.9. Meanwhile, a University of Vermont professor of mathematics and astronomy, James Dean, proposed a more complex method — the “method of harmonic means” — under which a divisor would be chosen so that the whole numbers generated would create average constituencies for the congressional delegations of each state most closely approximating the divisor. The harmonic means of two numbers is their product divided by their average. The harmonic means (Dean) method can result in certain quotients being rounded up irrespective of whether the fractional division gave the state less than half or more than half an additional congressional seat. Neither the smallest divisors (Adams) method nor the harmonic means (Dean) method — both of which Montana has pressed in its litigation over the 1990 census apportionment — was ever adopted by Congress. However, yet another method— the “method of major fractions” devised by Senator Daniel Webster of Massachusetts — was adopted for the 1842 apportionment following the 1840 census. Under the major fractions (Webster) method, the fractional remainders after division of the state population by the chosen divisor would be allocated by providing one additional representative for each state having a fraction greater than one half. The Congress departed from the major fractions (Webster) method with the 1850 census reapportionment. A third method, the “method of greatest fractions” advanced by Ohio Congressman Samuel F. Vinton involving a variation on the Hamilton method which President Washington had vetoed in 1792, was employed by the Congress initially in 1852. The greatest fractions (Vinton) method allocated additional Representatives to states having the largest fractional remainders after the whole numbers yielded by division were accounted for. The greatest fractions (Vin-ton) method had a disturbing paradox, however. Under certain circumstances, a state could receive fewer seats after the number of seats in the House was increased than it would have received if the seat number remained constant. This anomaly was presented most dramatically in the aftermath of the 1880 census when it was discovered that under the greatest fractions (Vinton) method, Alabama would receive eight seats if the House size was 299 but only seven seats if the House size were increased to 300. Congress used the greatest fractions (Vinton) method in 1862 and 1872 but avoided the paradox by allocating additional representatives beyond those generated through strict use of that method. Because of its concern over the need to adjust the greatest fractions (Vinton) method to avoid the population paradox, Congress began to use the major fractions (Webster) method as a cross check. In the apportion-ments following the 1880, 1890, and 1900 censuses, the House size was set to insure that no state would lose any House seat and would receive an additional seat for any major fractional remainder. This effort proved especially demanding with the 1900 census when Congress was forced to experiment with projected House sizes ranging from 350 to 400 seats in order to understand the impact of apportionment on the projected congressional delegations, especially those of Maine and Colorado. The experiments revealed partisan and ideological fissures within the Congress as various groups sought to reinforce their voting strengths through the apportionment process. Congress returned to the major fractions (Webster) method in 1911 when it finally fixed House membership at 435 seats. Having fixed the available seats for apportionment, however, the Congress created the conditions for an impasse in which there would be no safety valve of manipulating the number of House seats to reach an accommodation. Henceforth the states would be contesting rights in a limited pool of House seats. The impasse was confronted during the next reapportionment cycle. In the reapportionment efforts following the 1920 census, increased industrialization and the mechanization of agriculture accelerated in a war economy caused dramatic demographic changes. The substantial migration from rural to urban areas appeared likely to lead to a loss of House seats by as many as ten states. The time-honored expedient of mitigating relative loss by increasing the size of the House failed, however, when a bill to increase the House size to 483 seats was rejected. Despite repeated but unsuccessful efforts by Congress to meet its constitutional mandate to reapportion after every census, the decade of the 1920’s passed with the 1911 apportionment continuing as the basis for allo-eating seats to the House of Representatives. During the 1920’s a sixth method of apportionment was fully articulated by Professor Edward Y. Huntington of Harvard University, refining the work of Joseph A. Hill, a senior statistician at the Bureau of the Census. The method — which came to be known as the equal proportions (Huntington-Hill) method — sought to measure the disparities between state congressional delegations in relative terms. Thus, under the Huntington-Hill method, after the divisor provided by the size of the House was chosen, each state was assigned a number of seats so that no transfer of any one seat could reduce the percentage difference in representation between the states. In an effort to break the impasse evidenced by the failure to effect a reapportionment following the 1920 census, House Speaker Nicholas Longworth asked the National Academy of Sciences (NAS) to evaluate the various known methods of apportionment. A panel of respected mathematicians chosen for the task reviewed five of the six methods which had evolved for dealing with the problem. Four measures of equity can be found in the panel’s analysis: 1) Persons per representative (average district size) — the state’s population divided by its number of representatives. 2) Each person’s share of a representative — the number of a state’s representatives divided by its population. 3) Representation surplus — the difference between (i) the number of representatives of an over-represented state, and (ii) the number of representatives of an underrepresented state multiplied by the population of the over-represented state divided by the population of the under-represented state. 4) Representation deficiency — the difference between (i) the number of representatives of an under-represented state, and (ii) the number of representatives of an over-represented state multiplied by the population of the under-represented state divided by the population of the over-represented state. Measured in absolute terms in comparisons between any two states, four of the five methods were variously found to achieve most successfully one of these measures of equity. The harmonic means (Dean) method was most successful in reducing the absolute difference between the number of persons per representative. The major fractions (Webster) method was most successful in reducing the absolute difference between each person’s share of a representative. The smallest divisors (Adams) method was most successful in reducing the absolute representation surplus, and the greatest divisors (Jefferson) method was most successful in reducing the absolute representation deficiency. When measured in relative terms, however, the equal proportions (Huntington-Hill) method was most successful in reducing the variation in both the number of persons per representative and in each person’s share of a representative. Moreover, the NAS panel concluded that the equal proportions (Huntington-Hill) method among the five methods “occupie[d] mathematically a neutral position with respect to emphasis on larger and smaller states.” Accordingly, the NAS committee recommended adoption of the equal proportions (Huntington-Hill) method for congressional apportionment. After receipt of the NAS Report in 1929, the Congress passed an apportionment statute which provided that if no new apportionment method were agreed upon, the method of the last apportionment would be used. The 1929 apportionment statute was designed not merely to provide the previous method of apportionment as a default method in the absence of affirmative congressional action, it also required the President to transmit apportionment calculations based on the new census in light of both the major fractions (Webster) method and the equal proportions (Huntington-Hill) method. The reapportionment following the 1930 census proceeded relatively smoothly because both the major fractions (Webster) method and the equal proportions (Huntington-Hill) method led to the same allocations. Although Congress formally utilized the major fractions, it also in fact employed the equal proportions (Huntington-Hill) method at the same time. The apportionment following the 1940 census brought matters to a head again, however, because the allocations produced by the two methods were the same except for two states. Under the equal proportions (Huntington-Hill) method, Arkansas, which was a predominantly Democratic state, would be entitled to seven Representatives and Michigan, which was a predominantly Republican state, to seventeen; under the major fractions (Webster) method, Arkansas would be entitled to six Representatives and Michigan to eighteen. In a straight partisan and parochial House vote, “[e]very Democrat, except those from Michigan voted [to establish the equal proportions (Huntington-Hill) method as the permanent method for calculating reapportionment allocations], and every Republican voted against.” Balinski & Young, supra note 13, at 58. Ultimately, after further congressional consideration, the equal proportions (Huntington-Hill) method was signed into law as the permanent method for reapportionment. Congress has periodically initiated reexamination of the method of reapportionment since 1941. For example, in 1948 Congress requested from the NAS a report on “developments in the mathematical aspects of the apportionment problem as it affects the Congress of the United States....” Three nationally prominent mathematicians re-examined the 1929 NAS study as well as other studies subsequently produced by others. In their 1948 report, the NAS mathematicians reaffirmed the NAS’s 1929 findings, stating that the equal proportions (Huntington-Hill) method was the best method for “minimizing the [percent] discrepancy in the state-averaged district populations and the individual’s share in a representative,” and that this method stood in a middle position (i.e., a mathematically neutral position) as compared to the other methods examined. In 1971 the Subcommittee on Census and Statistics of the House Committee on Post Office and Civil Service produced a report which described the methodology and procedures which are used to apportion representatives among the several states. Although this report examined the historical developments which led to adoption of the equal proportions (Huntington-Hill) method, it contained no recommendation for changing that apportionment method. In 1981 the Subcommittee on Census and Population of the House Committee on Post Office and Civil Service held a hearing on H.R.1990, a bill which would have required revisions in the format and timing of certain decennial census reports issued by the Bureau of the Census. However, at the outset of the hearing, the Subcommittee Chairman noted that “the question of the adequacy of the apportionment formula known as the equal proportions method enacted by Congress in 1941, overshadows any consideration of ... minor technical changes in census procedures.” He went on to observe that “considerable technological advancements and methodological refinements” had occurred since the enactment of the equal proportions (Huntington-Hill) method, which had “potentially rendered] equal proportion a less than precise method of satisfying the court imposed standards of equal representation.” Following the 1981 hearing, no legislation was enacted to modify the authorized method for calculating the allocation of House seats. The equal proportions (Huntington-Hill) method, codified at 2 U.S.C. § 2a(a), has thus remained — despite repeated congressional reexaminations — the authorized method for calculating the allocation of House seats; it was the method used to apportion congressional seats following the 1990 census. Pursuant to the directions of § 2a(a), a calculation of the House apportionment according to the equal proportions (Huntington-Hill) method based upon the 1990 census was prepared by the defendant officials of the Bureau of the Census and Department of Commerce and delivered to the President, who in turn transmitted this calculation to the Congress. The defendant Anderson, as Clerk of the United States House of Representatives, thereupon transmitted to the governors of the several states a certificate identifying the number of representatives to which that Governor’s state would be entitled. The certificate received by the Governor of Massachusetts states that Massachusetts will be entitled to ten representatives, a loss of one member in its current congressional delegation. We have rehearsed the history of congressional efforts to address the reapportionment question at some length to illustrate the extent of considered congressional involvement in the issue. The Constitutional command of decennial reapportionment coupled with the Congress’s own institutional concerns has resulted in continuous, thoughtful, extensive and intensive examination of the problem by Congress throughout the past two centuries. While parochial and partisan interests have no doubt played their part in those deliberations — as they do in all legislation — it is apparent that Congress has carefully addressed itself to finding a method which implements the basic principle of assuring as nearly as practicable equal representation in the House of Representatives for equal numbers of people. The question of practicability has, of course, been hotly debated, but the congressional resolutions of the issue throughout the nation’s history have underscored the very practical measure of success enunciated by Justice Story in his Commentaries on the Constitution: [T]he truest rule seems to be, that the apportionment ought to be the nearest approximation to the terms of the constitution; and the rule ought to be such, that it shall always work the same way in regard to all the states, and be as little open to cavil, or controversy or abuse as possible. J. Story, Commentaries on the Constitution § 676 (1833). C. JUDICIAL STANDARDS The Supreme Court, after avoiding what had been perceived as the inhospitable “political thicket” of reapportionment disputes, Colegrove v. Green, 328 U.S. 549, 556, 66 S.Ct. 1198, 1201, 90 L.Ed. 1432 (1946) (Frankfurter, J.); see generally Lewis, Legislative Apportionment and the Federal Courts, 71 Harv.L.Rev. 1057 (1958), grasped the nettle in the 1960s and began developing a jurisprudence of reapportionment. 1.