Democratic Sen. Gary Peters of Michigan announced Tuesday that he will not seek reelection in 2026, leaving Congress at the end of his second term and opening up a highly competitive battleground Senate seat.

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

LANSING, Mich. (AP) — Michigan Sen. Gary Peters, who led the Democrats’ Senate campaign efforts the past two election cycles, has announced he will not seek a third term in 2026, creating a highly contested battleground seat expected to be highly coveted by both parties.