Districts that could decide the majority · tap a card to find it on the map
Expected vote in: AP's estimate of the percentage of the total expected vote counted so far.
Control of Congress for the second half of Donald Trump's presidency. All 435 seats in the House of Representatives and 35 of the Senate's 100 seats are being contested, including special elections in Florida and Ohio to fill the seats vacated by Secretary of State Marco Rubio and Vice President JD Vance.
Voters in 36 states will also elect governors, as well as state legislators and local officials.
Republicans hold majorities in both chambers. Democrats need to gain three seats in the House and four in the Senate.
A 50-50 Senate would leave Republicans in control, because Vice President JD Vance can cast tie-breaking votes.
The cost of living tops voters' concerns, with rising petrol prices, housing costs and healthcare coverage squeezing household budgets. Reproductive rights, immigration and the state of US democracy are also on the ballot, along with the US-Israel war on Iran and the growth of AI and data centres.
About 210 million, nearly eight in 10 US residents aged 18 or older, according to USAFacts. California has the most registered voters (23.2 million), followed by Texas (17.4 million) and Florida (13.6 million). Wyoming has the fewest, with 278,468.
A Pew Research Center survey from September 28 to October 4 found 44 percent of registered voters backed the Democratic candidate in their district and 36 percent the Republican. Men are evenly split at 42 percent each, while women favour Democrats by 45 percent to 31 percent.
Fewer than in presidential years. Since 1944, average turnout has been about 42 percent in midterms, compared with 58 percent in presidential races. Turnout was 46.1 percent in 2022.
A Democratic House could block Republican legislation, investigate the Trump administration through its committees and, if it chose, impeach the president. It would also gain leverage over government funding, raising the possibility of further shutdowns.
A Democratic Senate could block legislation and reject presidential nominees, including federal judges, who serve for life. The Senate also holds the trial if the House impeaches a president; removal requires a two-thirds majority.
No. Trump would remain president and could veto legislation, and overriding a veto needs a two-thirds vote in each chamber. Most bills also need 60 votes in the Senate to end debate.
Results start after the first polls close at 6pm Eastern Time (23:00 GMT) on November 3, but close races can take days. Final tallies can take days or weeks as mail-in and provisional ballots are counted. In Georgia, a Senate race with no majority winner goes to a run-off on December 1.
Early leads can shift as later ballots are counted, which on its own is not a sign of fraud.
