Senate Midterms: 13 Battlegrounds, 53 GOP Seats, and the Math for Control

Voters across the United States are casting ballots on Tuesday, November 3, 2026, to determine the balance of power in the U.S. Senate for the remainder of President Donald Trump's second term. The midterm elections feature 35 of the 100 Senate seats, a number that includes 33 regular elections and two special elections for the rest of the terms held by Marco Rubio in Florida and JD Vance in Ohio. The outcome will define the legislative landscape for the final two years of the current presidential administration.

Republicans currently hold 53 seats in the Senate, while Democrats hold 45, with two independents who caucus with the Democratic party. The arithmetic of the chamber is tight. Republicans can afford to lose no more than two seats to maintain their majority. Conversely, Democrats must achieve a net gain of four seats to seize control of the chamber. Eleven senators are not seeking reelection, including four Democrats and seven Republicans, which adds complexity to the calculation of potential seat changes.

Ballotpedia identifies 13 Senate races as battlegrounds. These contests span a range of political leanings and historical voting patterns. In Alaska, Republican incumbent Dan Sullivan faces a competitive race in a state where Trump won by 13.1 points in 2024. The special election in Florida, where Republican Ashley Moody is the candidate, is also considered competitive despite the state's strong Republican lean of 13.1 points in the previous presidential cycle.

Georgia presents a critical challenge for Democrats, with incumbent Jon Ossoff defending his seat in a state that Trump carried by 2.2 points. The Associated Press notes that economic strain and tariffs have made several of these states more competitive than in recent cycles. In Maine, Republican Susan Collins faces Democratic former state Senate President Troy Jackson in a race rated as a toss-up by all four major prediction services, including the Cook Political Report and Inside Elections.

Iowa is another pivotal race, currently rated as a toss-up or tilting Republican. The seat is open after the retirement of Republican Senator Joni Ernst. Trump won the state by 13.2 points in 2024. In Kansas, a traditionally Republican state, the race for the seat of incumbent Roger Marshall has become central to the fight for Senate control. The state is rated as a toss-up to lean Republican, with Trump having won by 16.2 points previously.

Michigan is an open seat following the retirement of Democrat Gary Peters. The race is rated as a toss-up to lean Democratic. Republican former Representative Mike Rogers faces Democrat Abdul El-Sayed. On Sunday, El-Sayed's former primary opponent, Haley Stevens, endorsed Rogers, adding a dynamic to the campaign. In Montana, the seat is open after the retirement of Republican Steve Daines. The state is a strong Republican hold, with Trump winning by 19.9 points in 2024, but the open nature of the race keeps it on the battleground list.

Nebraska features incumbent Republican Pete Ricketts, who is defending his seat in a state where Trump won by 20.3 points. New Hampshire is an open seat following the retirement of Democrat Jeanne Shaheen. The race is seen as competitive, with Democrat Chris Pappas facing former Republican Senator John E. Sununu. Trump won the state by a narrow margin, though the 2024 data shows Harris winning by 2.8 points, making it a key Democratic target.

North Carolina is an open seat after the retirement of Republican Thom Tillis, who clashed with President Trump. Democrat Roy Cooper faces former Republican National Committee chair Michael Whatley. The state is rated as competitive, with Trump having won by 3.3 points in 2024. In Ohio, the special election features Democratic former Senator Sherrod Brown against Republican Senator Jon Husted. Trump won the state by 11.2 points in the previous cycle.

Texas is the final battleground on the list, featuring a race for the seat associated with John Cornyn. Republican Attorney General Ken Paxton, whom Trump backed in the primary, faces Democrat James Talarico. Trump won Texas by 13.6 points in 2024. The Associated Press highlights that the Trump administration has filed a lawsuit related to the certification of the Senate result in Alaska, adding a layer of legal scrutiny to the process. The mood among Republicans is one of bracing for potential losses in the House while fighting to hold the Senate. Democrats are described as cautiously optimistic, with many voters expressing anger over high prices and the unpopular war with Iran.

More than 57 million people had already voted as of Monday, surpassing the early vote totals from four years ago in many closely watched states. The Associated Press notes that 35% of U.S. Adults approve of President Trump's job performance, while 25% approve of his handling of the economy. About seven in 10 say the country is heading in the wrong direction. Republican committees have outraised and outspent Democratic committees, helped by Trump-affiliated groups and Elon Musk. However, at the candidate level, Democrats outraised their opponents. The 2026 elections are likely to be the most expensive in history, with 88.1% of Republican general election TV ad spending going to states and districts Trump won in 2024. Winners in these 35 races will begin their six-year terms on January 3, 2027.