By KIM CHANDLER MONTGOMERY, Ala. (AP) — Alabama’s Republican primary for U.S. Senate is going to a June runoff between Katie Britt and U.S. Rep. Mo Brooks, who overcame losing former President Donald Trump's endorsement to remain a contender for the GOP nomination. The candidates are seeking the Senate seat now held by U.S. Sen. Richard Shelby, who is retiring. Britt is Shelby’s former chief of staff