Four states - Georgia, Kentucky, Idaho, and Oregon, hold primary contests on Tuesday, including several congressional showdowns that could shape key contests in the autumn battle for control of the House. And in a move that will give Republicans a bit of breathing room as they protect their fragile, razor-thin majority, voters in a California congressional district will choose a successor for former House Speaker Kevin McCarthy. But potentially grabbing the most attention during a day of coast-to-coast contests will be a county prosecutor primary in Atlanta. Fulton County District Attorney Fani Willis, who is leading the prosecution of former...