10 SHELBY COUNTY v. HOLDER Opinion of the Court (2011) (slip op., at 9). But the federal balance “is not just an end in itself: Rather, federalism secures to citizens the liberties that derive from the diffusion of sovereign power.” Ibid. (internal quotation marks omitted). More specifically, “ ‘the Framers of the Constitution intended the States to keep for themselves, as provided in the Tenth Amendment, the power to regulate elections.’ ” Gregory v. Ashcroft, 501 U. S. 452, 461–462 (1991) (quoting Sugarman v. Dougall, 413 U. S. 634, 647 (1973); some internal quotation marks omitted). Of course, the Federal Government retains significant control over federal elections. For instance, the Constitution authorizes Congress to establish the time and manner for electing Senators and Representatives. Art. I, §4, cl. 1; see also Arizona v. Inter Tribal Council of Ariz., Inc., ante, at 4–6. But States have “broad powers to determine the conditions under which the right of suffrage may be exercised.” Carrington v. Rash, 380 U. S. 89, 91 (1965) (internal quotation marks omitted); see also Arizona, ante, at 13–15. And “[e]ach State has the power to prescribe the qualifications of its officers and the manner in which they shall be chosen.” Boyd v. Nebraska ex rel. Thayer, 143 U. S. 135, 161 (1892). Drawing lines for congressional districts is likewise “primarily the duty and responsibility of the State.” Perry v. Perez, 565 U. S. ___, ___ (2012) (per curiam) (slip op., at 3) (internal quotation marks omitted). Not only do States retain sovereignty under the Constitution, there is also a “fundamental principle of equal sovereignty” among the States. Northwest Austin, supra, at 203 (citing United States v. Louisiana, 363 U. S. 1, 16 (1960); Lessee of Pollard v. Hagan, 3 How. 212, 223 (1845); and Texas v. White, 7 Wall. 700, 725–726 (1869); emphasis added). Over a hundred years ago, this Court explained that our Nation “was and is a union of States, equal in power, dignity and authority.” Coyle v. Smith, 221 U. S. 559, 567 (1911). Indeed, “the constitutional equality of the

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