Republican Senator Dan Sullivan is seeking a third term in the ranked-choice-voting state, but former Congresswoman Mary Peltola's entry has transformed the race. She outraised Sullivan roughly 3.5-to-1 in Q2 of 2026, posting record-breaking fundraising forAlaska.

Jon Ossoff is the only sitting Democratic senator running for re-election in a state Donald Trump carried in 2024, making this one of the most high-stakes defensive races in the country. Keeping Ossoff in office is required to win a Democratic Senate majority.

Senator Joni Ernst's retirement has opened up a seat in a state battered by destructive Republican policies from the state and federal governments, including tariffs. Democratic state representative and former Paralympian Josh Turek is running against Congresswoman Ashley Hinson, a strong Trump supporter. Turek is focused on addressing the real concerns of Iowans, who are poised to deliver big results for Democrats up and down the ballot.

While Kansas is considered a red state, first-term Senator Roger Marshall has been a strong supporter of Trump’s unpopular policies that have hurt Kansans, from tariffs to the war in Iran. Multiple independent election analysts moved this race out of the “safe Republican” category after Rev. Adam Hamilton won a strong victory in the Democratic primary. Rev. Hamilton, who outraised Marshall 6-to-1 last quarter, is the founding pastor of the nation’s largest United Methodist church and can uniquely appeal to Kansans across party lines.

Susan Collins is the only Republican senator who represents a state Trump has never won in any of his three presidential campaigns, making her the most vulnerable Republican incumbent in the Senate. Flipping this seat is one of Democrats' best offensive opportunities of the cycle and Democrats have a strong candidate in former Maine Senate President Troy Jackson, who long represented a Republican-leaning district in the legislature.

Senator Gary Peters' retirement has opened up this seat in a state with an even partisan lean, drawing massive attention and investment from both parties. Holding Michigan is a must-win for Democrats' path to reclaiming the Senate majority. The Democratic nominee is Abdul El-Sayed, the former health director in Wayne County, who is running against former Congressman Mike Rogers who narrowly lost to Senator Elissa Slotkin in 2024. Polls show a tight race.

Scott Colom is an elected district attorney who has proven he can win voters across party and racial lines in Mississippi. He is focused on taking on corruption in DC and the rising cost of living, including Trump’s tariffs and war in Iran, both of which Senator Hyde-Smith has supported. Black voters make up about one-third of the electorate—more than any other state—but turn out at a lower rate than white voters. Colom’s path to victory is predicated on increasing turnout among Black voters and modestly increasing support with white voters.

Independent Dan Osborn had the best performance for any challenger in a Republican-held seat in the 2024 election cycle, earning 46.5% of the vote against Senator Deb Fischer. He is running again, challenging Senator Pete Ricketts, looking to build on his strong showing. Multiple polls have shown a close race, in a state hurt by Trump’s tariffs, and where Democrats are fired up to flip this seat and NE-2. There is no Democratic candidate for Senate in Nebraska, and Osborn is our best chance to defeat the Republican incumbent.

Following Senator Jeanne Shaheen's retirement, Democrats are positioned to benefit from the significant momentum in the state that supported Harris during the 2024 election.

Republican Senator Thom Tillis is retiring, and Democrats landed a major recruit in former Governor Roy Cooper, who is well-known and has won multiple statewide elections before. This is currently rated one of Democrats' most likely Senate flips of the cycle, and it's central to any majority math. Republicans are starting to pour money into the state to prop up former RNC Chair and oil lobbyist Michael Whatley in their attempts to hold this seat.

Former Senator Sherrod Brown is running to win this seat against an appointed incumbent who is tied to the largest corruption scandal in state history, in a state that has been hit hard by economic challenges and tariffs. Brown has a track record of winning working-class voters in red-leaning territory. Ohio is one of Democrats' most realistic offensive flips.

Democrat James Talarico has built a formidable fundraising operation and is drawing national attention, while Republican nominee Ken Paxton enters the general election with high name recognition—and significant political baggage after years of scandals, investigations, and a bruising primary fight. In a wave year, Texas could be the seat that puts the Senate majority out of reach for Republicans.