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 in a primary election to succeed them. That's 40.6% of the 69 members of the U.S. Congress who are not running for re-election this year.
In 2024, 17 of the 53 members of the U.S. Congress (32.1%) who did not run for re-election endorsed a candidate in a primary to succeed them.
