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Full Opinion
U. S. TERM LIMITS, INC., et al.
v.
THORNTON
ET AL.
United States Supreme Court.
*781 *781 Stevens, J., delivered the opinion of the Court, in which Kennedy, Souter, Ginsburg, and Breyer, JJ., joined. Kennedy, J., filed a concurring opinion, post, p. 838. Thomas, J.,filed a dissenting opinion, in which Rehnquist, C. J., and O'Connor and Scalia, JJ., joined, post, p. 845.
J. Winston Bryant, Attorney General of Arkansas, pro se, argued the cause for petitioner in No. 93-1828. With him on the briefs were Jeffrey A. Bell, Deputy Attorney General, Ann Purvis and David R. Raupp, Assistant Attorneys General, Griffin B. Bell, Paul J. Larkin, Jr., Richard F. Hatfield, and Cleta Deatherage Mitchell. John G. Kester argued the cause for petitioners in No. 93-1456. With him on the briefs was H. William Allen. Robert H. Bork, Theodore B. Olson, and Thomas G. Hungar filed briefs for Representative Jay Dickey et al., and Edward W. Warren filed briefs for the Republican Party of Arkansas et al., as respondents under this Court's Rule 12.4.
Louis R. Cohen argued the cause for respondents in both cases. With him on the brief for respondents in No. 93-1828 were W. Hardy Callcott, Peter B. Hutt II, and Elizabeth J. Robben. Henry Maurice Mitchell, Sherry P. Bartley, Rex E. Lee, Carter G. Phillips, Ronald S. Flagg, Mark D. Hopson, Joseph R. Guerra, and Jeffrey T. Green filed a brief for respondent Thornton in No. 93-1456.
Solicitor General Days argued the cause for the United States as amicus curiae urging affirmance. With him on *782 the brief were Assistant Attorneys General Dellinger and Hunger, Deputy Solicitor General Bender, Paul R. Q. Wolfson, and Douglas N. Letter.[ā ]
Justice Stevens, delivered the opinion of the Court.
The Constitution sets forth qualifications for membership in the Congress of the United States. Article I, § 2, cl. 2, which applies to the House of Representatives, provides:
*783 "No Person shall be a Representative who shall not have attained to the Age of twenty five Years, and been seven Years a Citizen of the United States, and who shall not, when elected, be an Inhabitant of that State in which he shall be chosen."
Article I, § 3, cl. 3, which applies to the Senate, similarly provides:
"No Person shall be a Senator who shall not have attained to the Age of thirty Years, and been nine Years a Citizen of the United States, and who shall not, when elected, be an Inhabitant of that State for which he shall be chosen."
Today's cases present a challenge to an amendment to the Arkansas State Constitution that prohibits the name of an otherwise-eligible candidate for Congress from appearing on the general election ballot if that candidate has already served three terms in the House of Representatives or two terms in the Senate. The Arkansas Supreme Court held that the amendment violates the Federal Constitution. We agree with that holding. Such a state-imposed restriction is contrary to the "fundamental principle of our representative democracy," embodied in the Constitution, that "the people should choose whom they please to govern them." Powell v. McCormack, 395 U. S. 486, 547 (1969) (internal quotation marks omitted). Allowing individual States to adopt their own qualifications for congressional service would be inconsistent with the Framers' vision of a uniform National Legislature representing the people of the United States. If the qualifications set forth in the text of the Constitution are to be changed, that text must be amended.
I
At the general election on November 3, 1992, the voters of Arkansas adopted Amendment 73 to their State Constitution. Proposed as a "Term Limitation Amendment," its preamble stated:
*784 "The people of Arkansas find and declare that elected officials who remain in office too long become preoccupied with reelection and ignore their duties as representatives of the people. Entrenched incumbency has reduced voter participation and has led to an electoral system that is less free, less competitive, and less representative than the system established by the Founding Fathers. Therefore, the people of Arkansas, exercising their reserved powers, herein limit the terms of elected officials."
The limitations in Amendment 73 apply to three categories of elected officials. Section 1 provides that no elected official in the executive branch of the state government may serve more than two 4-year terms. Section 2 applies to the legislative branch of the state government; it provides that no member of the Arkansas House of Representatives may serve more than three 2-year terms and no member of the Arkansas Senate may serve more than two 4-year terms. Section 3, the provision at issue in these cases, applies to the Arkansas Congressional Delegation. It provides:
"(a) Any person having been elected to three or more terms as a member of the United States House of Representatives from Arkansas shall not be certified as a candidate and shall not be eligible to have his/her name placed on the ballot for election to the United States House of Representatives from Arkansas.
"(b) Any person having been elected to two or more terms as a member of the United States Senate from Arkansas shall not be certified as a candidate and shall not be eligible to have his/her name placed on the ballot for election to the United States Senate from Arkansas."
Amendment 73 states that it is self-executing and shall apply to all persons seeking election after January 1, 1993.
On November 13, 1992, respondent Bobbie Hill, on behalf of herself, similarly situated Arkansas "citizens, residents, *785 taxpayers and registered voters," and the League of Women Voters of Arkansas, filed a complaint in the Circuit Court for Pulaski County, Arkansas, seeking a declaratory judgment that § 3 of Amendment 73 is "unconstitutional and void." Her complaint named as defendants then-Governor Clinton, other state officers, the Republican Party of Arkansas, and the Democratic Party of Arkansas. The State of Arkansas, through its Attorney General, petitioner Winston Bryant, intervened as a party defendant in support of the amendment. Several proponents of the amendment also intervened, including petitioner U. S. Term Limits, Inc.
On cross-motions for summary judgment, the Circuit Court held that § 3 of Amendment 73 violated Article I of the Federal Constitution.[1]
With respect to that holding, in a 5-to-2 decision, the Arkansas Supreme Court affirmed. U. S. Term Limits, Inc. v. Hill, 316 Ark. 251, 872 S. W. 2d 349, 351 (1994). Writing for a plurality of three justices, Justice Robert L. Brown concluded that the congressional restrictions in Amendment 73 are unconstitutional because the States have no authority "to change, add to, or diminish" the requirements for congressional service enumerated in the Qualifications Clauses. Id. , at 265, 872 S. W. 2d, at 356. He noted:
"If there is one watchword for representation of the various states in Congress, it is uniformity. Federal legislators speak to national issues that affect the citizens of every state. . . . The uniformity in qualifications mandated *786 in Article 1 provides the tenor and the fabric for representation in the Congress. Piecemeal restrictions by State would fly in the face of that order." Ibid.
Justice Brown's plurality opinion also rejected the argument that Amendment 73 is "merely a ballot access amendment," concluding that "[t]he intent and the effect of Amendment 73 are to disqualify congressional incumbents from further service." Id. , at 265-266, 872 S. W. 2d, at 356-357. Justice Brown considered the possibilities that an excluded candidate might run for Congress as a write-in candidate or be appointed to fill a vacancy to be "glimmers of opportunity. . . [that] are faint indeedā so faint in our judgment that they cannot salvage Amendment 73 from constitutional attack." Id. , at 266, 872 S. W. 2d, at 357. In separate opinions, Justice Dudley and Justice Gerald P. Brown agreed that Amendment 73 violates the Federal Constitution.
Two justices dissented from the federal constitutional holding. Justice Hays started from "the premise that all political authority resides in the people, limited only by those provisions of the federal or state constitutions specifically to the contrary." Id., at 281, 872 S. W. 2d, at 367. Because his examination of the text and history of the Qualifications Clauses convinced him that the Constitution contains no express or implicit restriction on the States' ability to impose additional qualifications on candidates for Congress, Justice Hays concluded that § 3 is constitutional. Special Chief Justice Cracraft, drawing a distinction between a measure that "impose[s] an absolute bar on incumbent succession" and a measure that "merely makes it more difficult for an incumbent to be elected," id. , at 284, 872 S. W. 2d, at 368, concluded that Amendment 73 does not even implicate the Qualifications Clauses, and instead is merely a permissible ballot access restriction.
The State of Arkansas, by its Attorney General, and the intervenors petitioned for writs of certiorari. Because of the importance of the issues, we granted both petitions and *787 consolidated the cases for argument. See 512 U. S. 1218 (1994). We now affirm.
II
As the opinions of the Arkansas Supreme Court suggest, the constitutionality of Amendment 73 depends critically on the resolution of two distinct issues. The first is whether the Constitution forbids States to add to or alter the qualifications specifically enumerated in the Constitution. The second is, if the Constitution does so forbid, whether the fact that Amendment 73 is formulated as a ballot access restriction rather than as an outright disqualification is of constitutional significance. Our resolution of these issues draws upon our prior resolution of a related but distinct issue: whether Congress has the power to add to or alter the qualifications of its Members.
Twenty-six years ago, in Powell v. McCormack, 395 U. S. 486 (1969), we reviewed the history and text of the Qualifications Clauses[2] in a case involving an attempted exclusion *788 of a duly elected Member of Congress. The principal issue was whether the power granted to each House in Art. I, § 5, cl. 1, to judge the "Qualifications of its own Members"[3] includes the power to impose qualifications other than those set forth in the text of the Constitution. In an opinion by Chief Justice Warren for eight Members of the Court,[4] we held that it does not. Because of the obvious importance of the issue, the Court's review of the history and meaning of the relevant constitutional text was especially thorough. We therefore begin our analysis today with a full statement of what we decided in that case.
The Issue in Powell
In November 1966, Adam Clayton Powell, Jr., was elected from a District in New York to serve in the United States House of Representatives for the 90th Congress. Allegations that he had engaged in serious misconduct while serving as a committee chairman during the 89th Congress led to the appointment of a Select Committee to determine his eligibility to take his seat. That committee found that Powell met the age, citizenship, and residency requirements set forth in Art. I, § 2, cl. 2. The committee also found, however, that Powell had wrongfully diverted House funds for the use of others and himself and had made false reports on expenditures of foreign currency. Based on those findings, the House after debate adopted House Resolution 278, excluding *789 Powell from membership in the House, and declared his seat vacant. See 395 U. S., at 489-493.
Powell and several voters of the district from which he had been elected filed suit seeking a declaratory judgment that the House Resolution was invalid because Art. I, § 2, cl. 2, sets forth the exclusive qualifications for House membership. We ultimately accepted that contention, concluding that the House of Representatives has no "authority to exclude[5] any person, duly elected by his constituents, who meets all the requirements for membership expressly prescribed in the Constitution." 395 U. S., at 522 (emphasis in original); see also id., at 547.[6] In reaching that conclusion, we undertook a detailed historical review to determine the intent of the Framers. Though recognizing that the Constitutional Convention debates themselves were inconclusive, see id. , at 532, we determined that the "relevant historical materials" reveal that Congress has no power to alter the qualifications in the text of the Constitution, id. , at 522.
Powell's Reliance on History
We started our analysis in Powell by examining the British experience with qualifications for membership in Parliament, focusing in particular on the experience of John Wilkes. While serving as a member of Parliament, Wilkes had published an attack on a peace treaty with France. This *790 literary endeavor earned Wilkes a conviction for seditious libel and a 22-month prison sentence. In addition, Parliament declared Wilkes ineligible for membership and ordered him expelled. Despite (or perhaps because of) these difficulties, Wilkes was reelected several times. Parliament, however, persisted in its refusal to seat him. After several years of Wilkes' efforts, the House of Commons voted to expunge the resolutions that had expelled Wilkes and had declared him ineligible, labeling those prior actions "`subversive of the rights of the whole body of electors of this kingdom.' " Id. , at 528, quoting 22 Parliamentary History of England 1411 (1782) (Parl. Hist. Eng.). After reviewing Wilkes' "long and bitter struggle for the right of the British electorate to be represented by men of their own choice," 395 U. S., at 528, we concluded in Powell that "on the eve of the Constitutional Convention, English precedent stood for the proposition that `the law of the land had regulated the qualifications of members to serve in parliament' and those qualifications were `not occasional but fixed.' " Ibid. , quoting 16 Parl. Hist. Eng. 589, 590 (1769).
Against this historical background, we viewed the Convention debates as manifesting the Framers' intent that the qualifications in the Constitution be fixed and exclusive. We found particularly revealing the debate concerning a proposal made by the Committee of Detail that would have given Congress the power to add property qualifications. James Madison argued that such a power would vest "`an improper & dangerous power in the Legislature,' " by which the Legislature "`can by degrees subvert the Constitution.' " 395 U. S., at 533-534, quoting 2 Records of the Federal Convention of 1787, pp. 249-250 (M. Farrand ed. 1911) (hereinafter Farrand).[7] Madison continued: "`A Republic may be *791 converted into an aristocracy or oligarchy as well by limiting the number capable of being elected, as the number authorised to elect.' " 395 U. S., at 534, quoting 2 Farrand 250. We expressly noted that the "parallel between Madison's arguments and those made in Wilkes' behalf is striking." 395 U. S., at 534.
The Framers further revealed their concerns about congressional abuse of power when Gouverneur Morris suggested modifying the proposal of the Committee of Detail to grant Congress unfettered power to add qualifications. We noted that Hugh Williamson "expressed concern that if a majority of the legislature should happen to be `composed of any particular description of men, of lawyers for example,. . . the future elections might be secured to their own body.' " Id. , at 535, quoting 2 Farrand 250. We noted, too, that Madison emphasized the British Parliament's attempts to regulate qualifications, and that he observed: "`[T]he abuse they had made of it was a lesson worthy of our attention.' " 395 U. S., at 535, quoting 2 Farrand 250. We found significant that the Convention rejected both Morris' modification and the Committee's proposal.
We also recognized in Powell that the post-Convention ratification debates confirmed that the Framers understood the qualifications in the Constitution to be fixed and unalterable by Congress. For example, we noted that in response to the antifederalist charge that the new Constitution favored the wealthy and well born, Alexander Hamilton wrote:
"`The truth is that there is no method of securing to the rich the preference apprehended but by prescribing qualifications of property either for those who may elect or be elected. But this forms no part of the power to be conferred upon the national government. . . . The *792 qualifications of the persons who may choose or be cho- sen, as has been remarked upon other occasions, are defined and fixed in the Constitution, and are unalter- able by the legislature. ` " 395 U. S., at 539, quoting The Federalist No. 60, p. 371 (C. Rossiter ed. 1961) (emphasis added) (hereinafter The Federalist).
We thus attached special significance to "Hamilton's express reliance on the immutability of the qualifications set forth in the Constitution." 395 U. S., at 540. Moreover, we reviewed the debates at the state conventions and found that they "also demonstrate the Framers' understanding that the qualifications for members of Congress had been fixed in the Constitution." Ibid.; see, e. g., id. , at 541, citing 3 Debates on the Adoption of the Federal Constitution 8 (J. Elliot ed. 1863) (hereinafter Elliot's Debates) (Wilson Carey Nicholas, Virginia).[8]
The exercise by Congress of its power to judge the qualifications of its Members further confirmed this understanding. We concluded that, during the first 100 years of its existence, "Congress strictly limited its power to judge the qualifications of its members to those enumerated in the Constitution." 395 U. S., at 542.
As this elaborate summary reveals, our historical analysis in Powell was both detailed and persuasive. We thus conclude now, as we did in Powell, that history shows that, with *793 respect to Congress, the Framers intended the Constitution to establish fixed qualifications.[9]
Powell's Reliance on Democratic Principles
In Powell, of course, we did not rely solely on an analysis of the historical evidence, but instead complemented that analysis with "an examination of the basic principles of our democratic system." Id. , at 548. We noted that allowing Congress to impose additional qualifications would violate that "fundamental principle of our representative democracy. . . `that the people should choose whom they please to govern them.' " Id. , at 547, quoting 2 Elliot's Debates 257 (A. Hamilton, New York).
Our opinion made clear that this broad principle incorporated at least two fundamental ideas.[10] First, we emphasized *794 the egalitarian concept that the opportunity to be elected was open to all.[11] We noted in particular Madison's statement in The Federalist that "`[u]nder these reasonable limitations [enumerated in the Constitution], the door of this part of the federal government is open to merit of every description, whether native or adoptive, whether young or old, and without regard to poverty or wealth, or to any particular profession of religious faith.' " Powell, 395 U. S., at 540, n. 74, quoting The Federalist No. 52, at 326. Similarly, we noted that Wilson Carey Nicholas defended the Constitution against the charge that it "violated democratic principles" by arguing: "`It has ever been considered a great security to liberty, that very few should be excluded from the right of being chosen to the legislature. This Constitution has amply attended to this idea. We find no qualifications required except those of age and residence.' " 395 U. S., at 541, quoting 3 Elliot's Debates 8.
Second, we recognized the critical postulate that sovereignty is vested in the people, and that sovereignty confers on the people the right to choose freely their representatives to the National Government. For example, we noted that "Robert Livingston . . . endorsed this same fundamental principle: `The people are the best judges who ought to represent them. To dictate and control them, to tell them whom they shall not elect, is to abridge their natural *795 rights.' " 395 U. S., at 541, n. 76, quoting 2 Elliot's Debates 292-293. Similarly, we observed that "[b]efore the New York convention . . . , Hamilton emphasized: `The true principle of a republic is, that the people should choose whom they please to govern them. Representation is imperfect in proportion as the current of popular favor is checked. This great source of free government, popular election, should be perfectly pure, and the most unbounded liberty allowed.' " 395 U. S., at 540-541, quoting 2 Elliot's Debates 257. Quoting from the statement made in 1807 by the Chairman of the House Committee on Elections, we noted that "restrictions upon the people to choose their own representatives must be limited to those `absolutely necessary for the safety of the society.' " 395 U. S., at 543, quoting 17 Annals of Cong. 874 (1807). Thus, in Powell, we agreed with the sentiment expressed on behalf of Wilkes' admission to Parliament: "`That the right of the electors to be represented by men of their own choice, was so essential for the preservation of all their other rights, that it ought to be considered as one of the most sacred parts of our constitution.' " 395 U. S., at 534, n. 65, quoting 16 Parl. Hist. Eng. 589-590 (1769).
Powell thus establishes two important propositions: first, that the "relevant historical materials" compel the conclusion that, at least with respect to qualifications imposed by Congress, the Framers intended the qualifications listed in the Constitution to be exclusive; and second, that that conclusion is equally compelled by an understanding of the "fundamental principle of our representative democracy . . . `that the people should choose whom they please to govern them.' " 395 U. S., at 547.
Powell's Holding
Petitioners argue somewhat half-heartedly that the narrow holding in Powell, which involved the power of the House to exclude a Member pursuant to Art. I, § 5, does not control the more general question whether Congress has the *796 power to add qualifications. Powell, however, is not susceptible to such a narrow reading. Our conclusion that Congress may not alter or add to the qualifications in the Constitution was integral to our analysis and outcome. See, e. g., id. , at 540 (noting "Framers' understanding that the qualifications for members of Congress had been fixed in the Constitution"). Only two Terms ago we confirmed this understanding of Powell in Nixon v. United States, 506 U. S. 224 (1993). After noting that the three qualifications for membership specified in Art. I, § 2, are of "a precise, limited nature" and "unalterable by the legislature, " we explained:
"Our conclusion in Powell was based on the fixed meaning of `[q]ualifications' set forth in Art. I, § 2. The claim by the House that its power to `be the Judge of the Elections, Returns and Qualifications of its own Members' was a textual commitment of unreviewable authority was defeated by the existence of this separate provision specifying the only qualifications which might be imposed for House membership." Id. , at 237.[12]*797 Un surprisingly, the state courts and lower federal courts have similarly concluded that Powell conclusively resolved the issue whether Congress has the power to impose additional qualifications. See, e. g., Joyner v. Mofford, 706 F. 2d 1523, 1528 (CA9 1983) ("In Powell . . . , the Supreme Court accepted this restrictive view of the Qualifications Clauseā at least as applied to Congress"); Michel v. Anderson, 14 F. 3d 623 (CADC 1994) (citing Nixon `s description of Powell `s holding); Stumpf v. Lau, 108 Nev. 826, 830, 839 P. 2d 120, 122 (1992) (citing Powell for the proposition that "[n]ot even Congress has the power to alter qualifications for these constitutional federal officers").[13]
*798 In sum, after examining Powell `s historical analysis and its articulation of the "basic principles of our democratic system," we reaffirm that the qualifications for service in Congress set forth in the text of the Constitution are "fixed," at least in the sense that they may not be supplemented by Congress.
III
Our reaffirmation of Powell does not necessarily resolve the specific questions presented in these cases. For petitioners argue that whatever the constitutionality of additional qualifications for membership imposed by Congress, the historical and textual materials discussed in Powell do not support the conclusion that the Constitution prohibits additional qualifications imposed by States. In the absence of such a constitutional prohibition, petitioners argue, the Tenth Amendment and the principle of reserved powers require that States be allowed to add such qualifications.
Before addressing these arguments, we find it appropriate to take note of the striking unanimity among the courts that have considered the issue. None of the overwhelming array of briefs submitted by the parties and amici has called to our attention even a single case in which a state court or federal court has approved of a State's addition of qualifications for a Member of Congress. To the contrary, an impressive number of courts have determined that States lack the authority to add qualifications. See, e. g., Chandler v. Howell, 104 Wash. 99, 175 P. 569 (1918); Eckwall v. Stadelman, 146 Ore. 439, 446, 30 P. 2d 1037, 1040 (1934); Stockton v. McFarland, 56 Ariz. 138, 144, 106 P. 2d 328, 330 (1940); State ex rel. Johnson v. Crane, 65 Wyo. 189, 197 P. 2d 864 (1948); Dillon v. Fiorina, 340 F. Supp. 729, 731 (N. M. 1972); Stack v. Adams, 315 F. Supp. 1295, 1297-1298 (ND Fla. 1970); Buckingham v. State, 42 Del. 405, 35 A. 2d 903, 905 (1944); Stumpf v. Lau, 108 Nev. 826, 830, 839 P. 2d 120, 123 (1992); Danielson v. Fitzsimmons, 232 Minn. 149, 151, 44 N. W. 2d 484, 486 (1950); In re Opinion of Judges, 79 S. D. 585, 587, *799 116 N. W. 2d 233, 234 (1962). Courts have struck down state-imposed qualifications in the form of term limits, see, e. g., Thorsted v. Gregoire, 841 F. Supp. 1068, 1081 (WD Wash. 1994); Stumpf v. Lau, 108 Nev., at 830, 839 P. 2d, at 123, district residency requirements, see, e. g., Hellmann v. Collier, 217 Md. 93, 100, 141 A. 2d 908, 911 (1958); Dillon v. Fiorina, 340 F. Supp., at 731; Exon v. Tiemann, 279 F. Supp. 609, 613 (Neb. 1968); State ex rel. Chavez v. Evans, 79 N. M. 578, 581, 446 P. 2d 445, 448 (1968) (per curiam), loyalty oath requirements, see, e. g., Shub v. Simpson, 196 Md. 177, 199, 76 A. 2d 332, 341, appeal dism'd, 340 U. S. 881 (1950); In re O'Connor, 173 Misc. 419, 421, 17 N. Y. S. 2d 758, 760 (Super. Ct. 1940), and restrictions on those convicted of felonies, see, e. g., Application of Ferguson, 57 Misc. 2d 1041, 1043, 294 N. Y. S. 2d 174, 176 (Super. Ct. 1968); Danielson v. Fitzsimmons, 232 Minn., at 151, 44 N. W. 2d, at 486; State ex rel. Eaton v. Schmahl, 140 Minn. 219, 220, 167 N. W. 481 (1918) (per curiam). Prior to Powell, the commentators were similarly unanimous. See, e. g., 1 W. Blackstone, Commentaries, Appendix 213 (S. Tucker ed. 1803) ("[T]hese provisions, as they require qualifications which the constitution does not, may possibly be found to be nugatory"); 1 Story § 627 (each Member of Congress is "an officer of the union, deriving his powers and qualifications from the constitution, and neither created by, dependent upon, nor controllable by, the states"); 1 J. Kent, Commentaries on American Law 228, n. a (3d ed. 1836) ("[T]he objections to the existence of any such power [on the part of the States to add qualifications are] . . . too palpable and weighty to admit of any discussion"); G. McCrary, American Law of Elections § 322 (4th ed. 1897) ("It is not competent for any State to add to or in any manner change the qualifications for a Federal office, as prescribed by the Constitution or laws of the United States"); T. Cooley, General Principles of Constitutional Law 268 (2d ed. 1891) ("The Constitution and laws of the United States determine what shall be the qualifications for federal offices, and state *800 constitutions and laws can neither add to nor take away from them"); C. Burdick, Law of the American Constitution 160 (1922) ("It is clearly the intention of the Constitution that all persons not disqualified by the terms of that instrument should be eligible to the federal office of Representative"); id. , at 165 ("It is as clear that States have no more right to add to the constitutional qualifications of Senators than they have to add to those for Representatives"); Warren 422 ("The elimination of all power in Congress to fix qualifications clearly left the provisions of the Constitution itself as the sole source of qualifications").[14] This impressive and uniform body of judicial decisions and learned commentary indicates that the obstacles confronting petitioners are formidable indeed.
Petitioners argue that the Constitution contains no express prohibition against state-added qualifications, and that Amendment 73 is therefore an appropriate exercise of a State's reserved power to place additional restrictions on the choices that its own voters may make. We disagree for two independent reasons. First, we conclude that the power to add qualifications is not within the "original powers" of the States, and thus is not reserved to the States by the Tenth Amendment. Second, even if States possessed some original power in this area, we conclude that the Framers intended *801 the Constitution to be the exclusive source of qualifications for Members of Congress, and that the Framers thereby "divested" States of any power to add qualifications.
The "plan of the convention" as illuminated by the historical materials, our opinions, and the text of the Tenth Amendment draws a basic distinction between the powers of the newly created Federal Government and the powers retained by the pre-existing sovereign States. As Chief Justice Marshall explained, "it was neither necessary nor proper to define the powers retained by the States. These powers proceed, not from the people of America, but from the people of the several States; and remain, after the adoption of the constitution, what they were before, except so far as they may be abridged by that instrument." Sturges v. Crowninshield, 4 Wheat. 122, 193 (1819).
This classic statement by the Chief Justice endorsed Hamilton's reasoning in The Federalist No. 32 that the plan of the Constitutional Convention did not contemplate "[a]n entire consolidation of the States into one complete national sovereignty," but only a partial consolidation in which "the State governments would clearly retain all the rights of sovereignty which they before had, and which were not, by that act, exclusively delegated to the United States." The Federalist No. 32, at 198. The text of the Tenth Amendment unambiguously confirms this principle:
"The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people."
As we have frequently noted, "[t]he States unquestionably do retain a significant measure of sovereign authority. They do so, however, only to the extent that the Constitution has not divested them of their original p