With Delaware’s September 15 primaries complete, the 2026 primary election calendar is over and the general-election field is set. Six weeks from now, voters will decide whether President Trump keeps a Republican Congress for the final two years of his term or faces a divided government.
Margins are tight in both chambers. This guide covers what is on the ballot, where the majorities stand, what history says about midterms, and how the voting rules have shifted since 2024.
The 2026 midterm elections are on Tuesday, November 3, 2026. All 435 House seats and 35 of 100 Senate seats are on the ballot, including special elections in Florida and Ohio. Voters in 36 states will also elect governors. Winners take office in January 2027 and form the 120th Congress.
What Is on the Ballot
Every House seat is up every two years, so all 435 districts vote this fall. Five of the six non-voting delegates are also on the ballot.
The Senate map has 35 contests. Thirty-three are regular Class II seats. The other two are special elections for seats vacated when Marco Rubio became secretary of state and JD Vance became vice president. Florida Gov. Ron DeSantis appointed Ashley Moody to Rubio’s seat, and Ohio’s appointed senator, Jon Husted, is defending Vance’s former seat.
Governors are on the ballot in 36 states and three territories. State legislatures are busy too. The National Conference of State Legislatures counts 88 of the nation’s 99 legislative chambers holding regularly scheduled elections this year.
Where Control of Congress Stands
Republicans hold the Senate 53-47, with two independents caucusing with Democrats.
Republicans are defending 22 of the 35 seats on the ballot, and Democrats need a net gain of four to take the majority.
The House is closer. According to Ballotpedia, Democrats need a net gain of three seats to win the majority, while Republicans can afford to lose no more than two.
Chamber | Current majority | Seats on the ballot | What flips control |
Senate | Republican, 53-47 | 35 (22 R, 13 D) | Democratic net gain of 4 |
House | Republican, narrow | All 435 | Democratic net gain of 3 |
Governors | Republican, 26-24 | 36 states, 3 territories | Not applicable |
The Races Analysts Are Watching
Forecasters at RacetotheWH list Maine and North Carolina as the best Democratic Senate pickup opportunities. Ohio became competitive when former Sen. Sherrod Brown entered the race against Husted, and Alaska tightened after former Rep. Mary Peltola launched a Senate campaign against Sen. Dan Sullivan. Republicans see their best offensive target in Georgia, where Democratic Sen. Jon Ossoff is seeking a second term after a narrow 2020 win.
For a deeper look at why a handful of states decide national control, read our explainer on what makes a battleground state.
What History Says About Midterms
The president’s party usually loses ground in midterms. In 2018, during Trump’s first term, Democrats flipped the House after netting 40 seats. That pattern is the main reason Democrats are optimistic about the House.
This year’s map complicates the history lesson, though. At least nine states will vote under new congressional lines drawn since mid-2025, and a Reuters analysis found the new maps improved Republican prospects in 16 districts and Democratic prospects in six. The 2026 cycle is the first in modern history where mid-decade redistricting could decide the majority.
Rules That Changed Since 2024
Three developments affect how ballots are cast and counted this year.
Redistricting. After the Supreme Court’s April 29, 2026, decision in Louisiana v. Callais narrowed Voting Rights Act claims, several Southern states redrew their maps. Missouri’s new map is on hold, and voters decide it as Proposition A on November 3.
Mail ballot deadlines. On June 29, 2026, the Supreme Court ruled 5-4 in Watson v. Republican National Committee that states may count mail ballots postmarked by Election Day that arrive afterward. Grace-period rules in roughly 15 states and D.C. remain in effect.
Citizenship verification. The SAVE America Act, which would require documentary proof of citizenship to register, passed the House on February 11, 2026, but stalled in the Senate. Federal courts have blocked the proof-of-citizenship provisions of the president’s 2025 election executive order.
How to Vote in November
The practical steps have not changed. Confirm your registration at vote.gov or your state election office, check your state’s early and mail voting options, and find your polling place. In 2024, 37.4 percent of voters cast ballots in person on Election Day, 35.2 percent voted early in person, and about 30 percent voted by mail, according to the U.S. Election Assistance Commission.
Registration deadlines are close. Until October 4, eligible citizens in every state can still register for the general election by any method their state offers.
Our Take: The Midterm Is a Referendum on the Majority, Not Just the President
Midterms are usually framed as a verdict on the White House. This year the more useful frame is the margin itself. A House majority that turns on three seats and a Senate map that favors Republicans mean the outcome will likely hinge on candidate quality in about a dozen districts and four or five states. Voters in those places carry outsized weight, and national mood alone will not settle it. Hosts Sam Stone and Chuck Warren, whose backgrounds span state policy and national campaigns (see the hosts page), will be tracking those races through November.
Related Breaking Battlegrounds Discussion
In June 2026, Chuck Warren and guest host Tim Mooney previewed the midterms with Tim Murtaugh, former communications director for the 2020 Trump campaign. They covered House and Senate prospects, redistricting, toss-up seats, and the Maine Senate race. Find the episode on the Breaking Battlegrounds Substack and more election coverage on the political podcast page.
Frequently Asked Questions
When are the 2026 midterm elections?
The general election is Tuesday, November 3, 2026. Many states let you vote before that date through early in-person voting or mail ballots, and every state’s primary has already taken place. Georgia holds any required general-election runoffs 28 days later, on December 1. Newly elected members of Congress are sworn in on January 3, 2027.
How many Senate seats are up in 2026?
Thirty-five Senate seats are on the ballot. Thirty-three are regularly scheduled Class II seats, and two are special elections in Florida and Ohio to fill the remaining terms of Marco Rubio and JD Vance. Republicans hold 22 of the 35 seats being contested, and Democrats need a net gain of four seats to win the majority.
Could control of the House change in 2026?
Yes. Democrats need a net gain of three seats, according to Ballotpedia. The president’s party historically loses House seats in midterms, and Democrats netted 40 seats in 2018. Mid-decade redistricting cuts the other way, since new maps drawn since 2025 improved Republican prospects in more districts than Democratic ones.
Do I need to re-register to vote in the midterms?
Usually not, if you have not moved or changed your name since your last registration. You should still confirm your status at vote.gov or your state election office, since voter rolls are routinely maintained. If you moved, update your registration before your state’s deadline or use same-day registration where your state allows it.
What ballot measures are on the 2026 ballot?
It depends on your state. High-profile examples include Missouri’s Proposition A, which decides whether the legislature’s 2025 congressional map takes effect, and an Alaska initiative to repeal the state’s top-four primary and ranked-choice voting system. Check your state election office for a sample ballot.
Conclusion
The 2026 midterms will set the terms of the last two years of President Trump’s term. The Senate map favors Republicans, the House is essentially a coin flip, and the new maps and court rulings of the past year have changed the ground rules in real ways. For voters, the practical work is simple: confirm your registration, choose how you will vote, and make a plan before November 3.
Related Reads
Sources
- Ballotpedia, United States Congress elections, 2026
- 270toWin, 2026 Senate Election Interactive Map (as of September 20, 2026)
- S. Election Assistance Commission, 2024 EAVS Report release (June 30, 2025)
- Supreme Court of the United States, Watson v. Republican National Committee, No. 24-1260 (June 29, 2026)
- Center for Election Innovation & Research, Voter Registration Deadlines Before the 2026 General Election
- RacetotheWH, 2026 Senate Predictions
Editorial Note: This article is intended for informational and analytical purposes. Political developments, policies, polling, and public statements can change over time. Readers should consult primary sources and official government information for the latest details.
