ATLANTA — Georgia’s election season is hardly a month in the rearview mirror, but already the battle lines are being drawn for a full slate of statewide elections and another bruising fight for the U.S. Senate. Gov. Brian Kemp is preparing for a reelection campaign with his head on a swivel. His allies are so worried about a rematch against Democrat Stacey Abrams that they’ve created a group to thwart her likely 2022 bid, even as he readies for a challenge from someone in the GOP’s far-right wing infuriated he didn’t seek to overturn Donald Trump’s defeat in the presidential race. The two Repu...