McConnell will step down as the Senate Republican leader in November after a record run in the job

WASHINGTON — WASHINGTON (AP) — Mitch McConnell, the longest-serving Senate leader in history who maintained his power in the face of dramatic convulsions in the Republican Party for almost two decades, will step down from that position in November.McConnell, who turned 82 last week, was set to announce his decision Wednesday in the well of the Senate, a place where he looked in awe from its back benches in 1985 when he arrived and where he grew increasingly comfortable in the front row…