2024 United States Senate Elections

The 2024 Senate Elections took place with Joe Biden's re-election as President. Despite Biden's victory over President Donald Trump, Republicans were able to take back control of the Senate, gaining an impressive gain of 4 seats. This was largely in part to many vulnerable Democratic incumbents in highly-Republican states. In total, no Republicans ran in a state Joe Biden won in 2020 or 2024, while 3 Democrats ran in states Donald Trump won in both 2020 and 2024, all by large margin victories. Additionally, 4 Democrats ran in states won by President Biden by less than 5 points, while only one Republican ran in a state that President Trump won by less than 5 points.

In total, Republicans held onto all their open seats and every incumbent Republican won re-election. On the other hand, 3 Democrats (Jon Tester of Montana, Jacky Rosen of Nevada and Joe Manchin of West Virginia) all lost re-election to Republicans. Additionally, Republicans won Arizona, where incumbent Senator Kyrsten Sinema was defeated in the primary, the first time an incumbent lost re-nomination since 2012.

In addition to the class 1 senate seats up for re-election, 2 other special elections took place: In Nebraska, Incumbent Senator Ben Sasse resigned to become the President of the University of Florida, and a special election was set to fill out his remaining term. In Louisiana, incumbent Senator John Kennedy resigned after winning election to become the Governor of Louisiana, and a special election was set to fill out his remaining term, ending in 2029.

Arizona
Incumbent United States Senate Kyrsten Sinema ran for re-election to a second term, but was narrowly defeated in the Democratic primary by United States Representative Reuben Gallego. Republican Kimberly Yee won her parties nomination. Yee, a popular moderate, won the election by a 4 point margin, even when President Joe Biden narrowly won the state in the Presidential election.