
On Aug. 4, Julian Beaudion (D) withdrew from the South Dakota general election for the U.S. Senate — the fifth time a major or minor party U.S. Senate nominee has withdrawn this year. As a result, this year ties with 2014 for the most nominee withdrawals (voluntary, misconduct-related, or due to death) since 1918. Beaudion…

On July 13, U.S. Sen. Gary Peters (D-Mich.), who is not running for re-election this year, endorsed Haley Stevens (D) in the Democratic primary to succeed him in representing Michigan in the U.S. Senate. Peters is the 28th member of the U.S. Congress who is not running for re-election this year to endorse a candidate…

Julia Letlow (R) defeated John Fleming (R) to win a June 27 Republican primary runoff for U.S. Senate in Louisiana. Incumbent Bill Cassidy (R) did not advance from the primary after finishing third with 24% of the vote. NOLA's Tyler Bridges wrote ahead of the runoff, "As during the primary, Letlow and Fleming are both…

John Cornyn’s (R-Tex.) primary loss to Ken Paxton (R) on May 26 is the first instance of a fourth-term senator losing re-election in the 21st century. Since 2000, only five senators who served three or more terms, including Cornyn, have lost their primary bids for re-election, including Joe Lieberman (I-Conn.), who went on to win…

Maine Gov. Janet Mills (D) announced on April 30 that she would suspend her campaign for the Democratic nomination for U.S. Senate, becoming the first governor to do so since 1988. In a statement, Mills said, “While I have the drive and passion, commitment and experience, and above all else — the fight — to…

Roy Cooper (D), Michael Whatley (R), and three other candidates are running in North Carolina's U.S. Senate election on November 3, 2026. Incumbent Thom Tillis (R) is retiring from public office. Prof. Chris Cooper described Cooper and Whatley as "Both good candidates ... raise exorbitant amounts of money. Neither is going to hurt their party’s…

Andy Barr, Daniel Cameron, Nate Morris, and nine others are running in the Republican primary for U.S. Senate in Kentucky on May 19, 2026. Incumbent Mitch McConnell (R) is not running, opening the seat for the first time since McConnell's election in 1984. As of Feb. 16, 2026, Barr, Cameron, and Morris led in polling,…

Seven candidates are running in the Republican primary for the U.S. Senate in Alabama on May 19, 2026. Jared Hudson (R), Steve Marshall (R), and Barry Moore (R) lead in polling and media attention. Incumbent Sen. Tommy Tuberville (R) is running for governor of Alabama rather than for another term in the U.S. Senate. President…

Sen. Cynthia Lummis (R-Wyo.) announced on Dec. 19, 2025, that she will not seek re-election to the U.S. Senate in 2026. Lummis posted on X, “Deciding not to run for reelection does represent a change of heart for me, but in the difficult, exhausting session weeks this fall I’ve come to accept that I do…

Rep. Jasmine Crockett (D-Texas) announced on Dec. 8, 2025, that she will run to represent Texas in the U.S. Senate in 2026 rather than for another term in the U.S. House of Representatives. As of Dec. 9, 2025, independent race forecasters The Cook Political Report, Inside Elections, and Sabato’s Crystal Ball have rated the general…