WASHINGTON — Every seat in the U.S. House of Representatives and a third of the Senate will be on the ballot Nov. 3, 2026, as voters decide who controls the 119th Congress when it convenes in January 2027.
Beyond Washington, the elections will determine governorships and control of 39 state legislative chambers.
The stakes are concrete: congressional majorities decide who can pass bills, block legislation, confirm judicial nominees and launch investigations. With partisan margins in both chambers razor-thin, a shift of a few seats changes what Congress can do in 2027 and 2028. State-level outcomes drive budgets, redistricting and election law.
The House races unfold across 435 districts, each electing one member. A majority requires 218 seats. National political trends shape the playing field, but local issues, incumbents and district lines drive individual outcomes.
Senators serve six-year terms, so roughly one-third of the chamber faces voters every two years. Any special elections would add to the 33 scheduled contests.
Open seats — created when incumbents retire — typically prove easier to flip than those with a sitting member on the ballot. Early Senate attention centers on Georgia, where Democrat Jon Ossoff defends his seat. Michigan is an open contest after Sen. Gary Peters announced his retirement, making it an immediate target for both parties. In Maine, Republican Sen. Susan Collins is running for re-election.
Primaries and candidate filing deadlines run from spring through summer. Party spending spikes after primary results are in. Early and mail voting often begins weeks before Election Day.
Analysts use the Partisan Voter Index, or PVI, to measure how a district leans against the national average. A district rated R+5 votes about five points more Republican than the country overall. Districts near even are the most likely to flip when political conditions shift.
Candidate fields can change quickly, particularly after fundraising deadlines, endorsements and early polling. The results will determine who holds power in Washington and in state capitals for the next two years.
