Republican Sen. Mitch McConnell has announced that he won’t seek reelection next year, ending a decadeslong tenure as a power broker who championed conservative causes but ultimately ceded ground to the fierce GOP populism of President Donald Trump.

Longtime Kentucky Sen. Mitch McConnell announced Thursday he won’t seek reelection in 2026, ending his run as one of the most powerful lawmakers in the U.S. McConnell, a Republican first elected in 1984, is the longest-serving Senate party leader in U.S. history. He plans to serve out the remainder of his term until it ends in 2027.

Longtime Kentucky Sen. Mitch McConnell will not seek reelection next year, he announced Thursday, ending a decadeslong run as one of the most powerful Republicans in the country.