Early voting has accelerated sharply across several states that could decide control of the U.S. Senate, adding a new measure of political engagement to a campaign already defined by economic anxiety and unusually competitive contests. The most important caution is just as clear: ballots cast early are not votes counted, and the partisan identity of a voter does not reveal the choice made on the ballot.

What changed in the early vote

More than 18 million Americans had voted by mail or in person by Thursday morning, according to an analysis that cited the University of Florida Election Lab. A separate review of state records found that participation as of Tuesday was running well ahead of the comparable point in the 2022 midterms in multiple Senate battlegrounds.

The increases were uneven but politically significant. Texas was 74% ahead of its 2022 pace, Kansas had more than doubled its total, and Maine, North Carolina and Ohio were each up by more than 30%, the AP found. Together, those figures point to a highly engaged electorate in states where Democrats are trying to capture Republican-held Senate seats. They do not establish which party is winning.

The national total is also moving quickly as states add new files on different schedules. That explains why same-day snapshots from reputable outlets can differ by millions of ballots. The stable finding is the direction: advance voting is substantial, and several of the largest gains are occurring where control of the Senate is most directly contested.

Why the Senate map matters

Republicans entered the campaign with a 53-47 Senate majority, so Democrats need a net gain of four seats for outright control. In Texas, nearly 1 million ballots had been cast by Tuesday as Democrat James Talarico and Republican Ken Paxton competed for the seat held by retiring Sen. John Cornyn. In Kansas, more than 55,000 voters had participated by the same point, more than twice the comparable 2022 figure, amid a race between Republican Sen. Roger Marshall and Democrat Adam Hamilton.

Those comparisons are especially notable because the two states have not usually been treated as Democratic Senate opportunities. Texas began in-person early voting on October 19 under the official calendar, while Kansas permits advance voting by mail and in person and opened the process earlier in October, according to the secretary of state's notice. Different opening dates make raw totals less useful than comparisons with the same point in a prior cycle.

Ohio and Maine are also drawing heavier participation as expensive Senate contests approach their final stretch. North Carolina, where Republicans had reduced some national spending after the race shifted, was likewise ahead of its 2022 pace. The pattern suggests that voters are responding to competitive campaigns, but it does not show whether one party is expanding the electorate or simply moving reliable supporters to earlier voting methods.

The party picture remains incomplete

Democrats account for a larger share of advance ballots in many states where registration or voter-file modeling is available. ABC's analysis found a more Democratic composition than in 2024 in Georgia and Iowa, while polling has also shown higher stated enthusiasm among Democratic voters. But registration is not a vote, and modeled partisanship adds another layer of uncertainty.

The timing of voting also differs by party. Republicans have recently been more likely to vote on Election Day, while Democrats have often relied more heavily on mail ballots. Campaigns may therefore be shifting when supporters vote rather than creating new voters. In Michigan, for example, most early participants identified in the analysis were high-propensity voters with a history of voting in recent general elections.

That history is why early-vote leads have often failed as stand-alone election forecasts. A party that banks votes early can redirect staff and advertising toward less consistent supporters. Yet its apparent lead can disappear once Election Day ballots arrive. Analysts cannot responsibly convert an early-voting margin into a projected final margin without assumptions about turnout among voters who have not yet cast ballots.

State rules shape the numbers

Administrative differences also complicate national comparisons. Ohio publishes daily absentee and in-person figures through an official dashboard, and the state ended the post-election grace period for mailed ballots, encouraging earlier returns. North Carolina's in-person period runs from October 15 through October 31, according to the state board's schedule, and includes same-day registration for eligible residents.

Other states report at different intervals or classify mail and in-person ballots differently. Some expanded early-voting access since 2022, which can raise participation even if overall turnout is unchanged. Those changes do not make the surge meaningless; they mean the comparison must account for both voter motivation and the mechanics of casting a ballot.

What to watch through November 3

The clearest test will be whether early participation keeps rising in competitive states without merely substituting for Election Day voting. Georgia and Michigan had high totals but were close to their 2022 pace, while Iowa was running about 6% behind despite competitive contests for governor, Senate and three House seats. Those contrasts argue against a single national narrative.

For both parties, the operational question is now who remains uncontacted and who still intends to vote. For the public, the responsible conclusion is narrower: voters are engaging early at elevated rates in several pivotal states, but the data describe participation, not winners. The balance of the Senate will depend on the ballots ultimately cast and counted under each state's rules.