delivered the opinion of the Court *

Under 2 U. S. C. §§ 1 and 7, the Tuesday after the first Monday in November in an even-numbered year “is established” as the date for federal congressional elections. Louisiana’s “open primary” statute provides an opportunity to fill the offices of United States Senator and Representative during the previous month, without any action to be taken on[*69] federal election day. The issue before us is whether such an ostensible election runs afoul of the federal statute. We hold that it does.

I

The Elections Clause of the Constitution, Art. I, § 4, cl. 1, provides that “[t]he Times, Places and Manner of holding Elections for Senators and Representatives, shall be prescribed in each State by the Legislature thereof; but the Congress may at any time by Law make or alter such Regulations.” The Clause is a default provision; it invests the States with responsibility for the mechanics of congressional elections, see Storer v. Brown, 415 U. S. 724, 730 (1974), but only so far as Congress declines to pre-empt state legislative choices, see Roudebush v. Hartke, 405 U. S. 15, 24 (1972) (“Unless Congress acts, Art. I, § 4, empowers the States to regulate”). Thus it is well settled that the Elections Clause grants Congress “the power to override state regulations” by establishing uniform rules for federal elections, binding on the States. U.S. Term Limits, Inc. v. Thornton, 514 U. S. 779, 832-833 (1995). “[T]he regulations made by Congress are paramount to those made by the State legislature; and if they conflict therewith, the latter, so far as the conflict extends, ceases to be operative.” Ex parte Siebold, 100 U. S. 371, 384 (1880).

One congressional rule adopted under the Elections Clause (and its counterpart for the Executive Branch, Art. II, § 1, cl. 3) sets the date of the biennial election for federal offices. See 2 U. S. C. §§ 1, 7; 3 U. S. C. § 1. Title 2 U. S. C. §7 was originally enacted in 1872, and now provides that “[t]he Tuesday next after the 1st Monday in November, in every even numbered year, is established as the day for the election, in each of the States and Territories of the United States, of Representatives and Delegates to the Congress commencing on the 3d day of January next thereafter.” This provision, along with 2 U. S. C. § 1 (setting the same[*70] rule for electing Senators under the Seventeenth Amendment) and 3 U. S. C. § 1 (doing the same for selecting Presidential electors), mandates holding all elections for Congress and the Presidency on a single day throughout the Union.

In 1975, Louisiana adopted a new statutory scheme for electing United States Senators and Representatives. In October of a federal election year, the State holds what is popularly known as an “open primary” for congressional offices, La. Rev. Stat. Ann. § 18:402(B)(1) (West Supp. 1997), in which all candidates, regardless of party, appear on the same ballot, and all voters, with like disregard of party, are entitled to vote, § 18:401(B) (West 1979). If no candidate for a given office receives a majority, the State holds a run-off (dubbed a “general election”) between the top two vote-getters the following month on federal election day. § 18:481 (West 1979). But if one such candidate does get a majority in October, that candidate “is elected,” §18:511(A) (West Supp. 1997), and no further act is done on federal election day to fill the office in question. Since this system went into effect in 1978, over 80% of the contested congressional elections in Louisiana have ended as a matter of law with the open primary. ^[1]

Respondents are Louisiana voters who sued petitioners, the State’s Governor and secretary of state, challenging the open primary as a violation of federal law. The District Court granted summary judgment to petitioners, finding no conflict between the state and federal statutes, whereas a divided panel of the Fifth Circuit reversed, concluding that Louisiana’s system squarely “conflicts with the federal statutes that establish a uniform federal election day.” 90 F. 3d 1026, 1031 (1996). We granted certiorari, 520 U. S. 1114 (1997), and now affirm.

[*71] II

The Fifth Circuit’s conception of the issue here as a narrow-one turning entirely on the meaning of the state and federal statutes is exactly right. For all of petitioners’ invocations of state sovereignty, there is no colorable argument that § 7 goes beyond the ample limits of the Elections Clause’s grant of authority to Congress. ^[2] When the federal statutes speak of “the election” of a Senator or Representative, they plainly refer to the combined actions of voters and officials meant to make a final selection of an officeholder (subject only to the possibility of a later run-off, see 2 U. S. C. § 8). ^[3] See N. Webster, An American Dictionary of the English Language 433 (C. Goodrich & N. Porter eds. 1869) (defining “election” as “[t]he act of choosing a person to fill an office”). By establishing a particular day as “the day” on which these actions must take place, the statutes simply regulate the time of the[*72] election, a matter on which the Constitution explicitly gives Congress the final say.

• While true that there is room what may constitute the final act of selection within the meaning of the law, our decision does not turn on any nicety in isolating precisely what acts a State must cause to be done on federal election day (and not before it) in order to satisfy the statute. Without paring the term “election” in § 7 down to the definitional bone, it is enough to resolve this case to say that a contested selection of candidates for a congressional office that is concluded as a matter of law before the federal election day, with no act in law or in fact to take place on the date chosen by Congress, clearly violates §7. ^[4]

Petitioners try to save the Louisiana system by arguing that, because Louisiana law provides for a “general election” on federal election day in those unusual instances when one is needed, the open primary system concerns only the “manner” of electing federal officials, not the “time” at which the elections will take place. Petitioners say that “[although Congress is authorized by the Constitution to alter or change the time, place and manner the States have chosen to conduct federal eleetions[,] in enacting 2 U. S. C. §§ 1 and 7, Congress sought only to alter the time in which elections were conducted, not their manner. Conversely,' the open elections system [changed only the manner by which Louisiana chooses its federal officers; it] did not change the timing of the general election for Congress.” Brief for Petitioners 21.

Even if the distinction mattered here, the State’s attempt to draw this time-manner line is merely wordplay, and wordplay just as much at odds with the Louisiana statute as that law is at odds with § 7. The State’s provision for an October election addresses timing quite as obviously as §7 does.[*73] State law straightforwardly provides that “[a] candidate who receives a majority of the votes cast for an office in a primary election is elected.” La. Rev. Stat. Ann. § 18:511(A) (West Supp. 1997). Because the candidate said to be “elected” has been selected by the voters from among all eligible office-seekers, there is no reason to suspect that the Louisiana Legislature intended some eccentric meaning for the phrase “is elected.” After a declaration that a candidate received a majority in the open primary, state law requires no farther act by anyone to seal the election; the election has already occurred. Thus, contrary to petitioners’ imaginative characterization of the state statute, the open primary does purport to affect the timing of federal elections: a federal election takes place'prior to federal election day whenever a candidate gets a majority in the open primary. As the attorney general of Louisiana conceded at oral argument, “Louisiana’s system certainly allows for the election of a candidate in October, as opposed to actually electing on Federal Election Day.” Tr. of Oral Arg. 6.

Ill

While the conclusion that Louisiana’s open primary system conflicts with 2 U. S. C. § 7 does not depend on discerning the intent behind the federal statute, our judgment is buttressed by an appreciation of Congress’s object “to remedy more than one evil arising from the election of members of Congress occurring at different times in the different States.” Ex parte Yarbrough, 110 U. S. 651, 661 (1884). As the sponsor of the original bill put it, Congress was concerned both with the distortion of the voting process threatened when the results of an early federal election in one State can influence later voting in other States, and with the burden on citizens foreed to turn out on two different election days to make final selections of federal officers in Presidential election years:

[*74] “Unless we do fix some time at which, as a rule, Representatives shall be elected, it will be in the power of each State to fix upon a different day, and we may have a canvass going on all over the Union at different times. It gives some States undue advantage_I can remember, in 1840, when the news from Pennsylvania and other States that held their elections prior to the presidential election settled the presidential election as effectually as it was afterward done- I agree ... that Indiana, Ohio, and Pennsylvania, by voting in October, have an influence. But what I contend is that that is an undue advantage, that it is a wrong, and that it is a wrong also to the people of those States, that once in four years they shall be put to the trouble of having a double election.” Cong. Globe, 42d Cong., 2d Sess., 141 (1871) (remarks of Rep. Butler).

See also Busbee v. Smith, 549 F. Supp. 494, 524 (DC 1982) (recounting the purposes of § 7), aff’d, 459 U. S. 1166 (1983). The Louisiana open primary has tended to foster both evils, having had the effect of conclusively electing more than 80% of the State’s Senators and Representatives before the election day elsewhere, and, in Presidential election years, having forced voters to turn out for two potentially conclusive federal elections.

IV

When Louisiana’s statute is applied to select from among congressional candidates in October, it conflicts with federal law and to that extent is void. The judgment below is affirmed.

It is so ordered.