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.

Now with his departure set, politicians and political hopefuls are starting to line up for the inevitable power vacuum of McConnell's retirement.