Gary Peters' exit creates a highly contested U.S. Senate battleground seat expected to be coveted by both major political parties.

U.S. Sen. Gary Peters announced this week he will not seek reelection, setting the stage for a potentially crowded 2026 race.

Democratic Sen. Gary Peters won’t run for re-election in Michigan in 2026, creating a pivotal open Senate seat in one of the most tightly divided battleground states in the U.S.