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 Senator Kyrsten Sinema, who was elected in 2018 as a Democrat, but switched to an independent in 2022, did not run for re-election to a second term. Democrats nominated Congressman Reuben Gallego from the 3rd district, while Republicans nominated Arizona State Treasurer Kimberly Yee. In the general election, Yee defeated Gallego, despite Democratic President Joe Biden winning Arizona on the same ballot. Yee's victory was attributed to her appeal to moderate voters who supported Sinema but were turned off by Gallego's more liberal policies.

Democratic Primary
Nominee Eliminated in Primary
 * Rueben Gallego, United States Representative from Arizona's 3rd Congressional district (2013-2025)
 * James Marvin, attorney

Republican Primary
Nominee Eliminated in Primary
 * Kimberly Yee, Arizona State Treasurer (2019-2025) and candidate for Governor in 2022
 * Blake Masters, venture capitalist and nominee for the United States Senate in 2022
 * Mark Finchem, former State Representative and nominee for Arizona Secretary of State in 2022
 * Jim Lamon, businessman and candidate for the United States Senate in 2022

Florida
Incumbent United States Senator Rick Scott ran for re-election to a second term in office. Scott was speculated to run for President in 2024, but declined and instead ran for another term in the Senate. Stephanie Murphy, the former congresswoman from Florida's 7th congressional district, was the Democratic nominee. Scott defeated Murphy in the general election, although he underperformed President Donald Trump in the Presidential election.

Republican Primary
Nominee
 * Rick Scott, incumbent United States Senator since 2019 and former Governor of Florida (2011-2019)

Democratic Nominee
Nominee
 * Stephanie Murphy, former United States Representative from Florida's 7th Congressional District (2017-2023)

Louisiana (Special)
United States Senator John Kennedy, who was re-elected in 2022, resigned in January 2024, after winning the 2023 Louisiana Gubernatorial elections. As Governor, Kennedy appointed Jeff Landry, the former State attorney general, as the interim Senator until the special election. Landry ran for a full term, racing several Republican and Democratic challengers. In the November Jungle Primary, Landry and former Democratic Governor John Bel Edwards advanced to the runoff. The runoff was expected to be close, with some polls showing Edwards in the early on. However, Landry was able to gain momentum and defeat Edwards by a larger than expected margin.

Jungle Primary
Republican Candidates Advanced to Runoff Defeated in Jungle Primary Democratic Candidates Advanced to Runoff Defeated in Jungle Primary
 * Jeff Landry, Incumbent United States Senator
 * Adam Graham, attorney
 * Joseph Cao, former United States Representative from Louisiana's 2nd Congressional District (2009-2011) and candidate for the Senate in 2016
 * John Schroeder, former Louisiana State Treasurer, candidate for Governor in 2023
 * John Bel Edwards, former Governor of Louisiana (2016-2024)
 * Gary Chambers, activist, candidate for the United States senate in 2022, perennial candidate.