WASHINGTON (AP) — 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. McConnell, the longest-serving Senate party leader in U.S. history, chose his 83rd birthday to share his decision not to run for another term in Kentucky and to retire when his current term ends. The scramble for McConnell’s seat intensified soon after McConnell spoke Thursday. Former state Attorney General Daniel Cameron, a Republican, says he’s in the race to succeed his one-time mentor.