BATON ROUGE, La. (AP) — Thousands of Louisiana voters have already cast early ballots for congressional candidates in what soon could be the wrong districts. Alabama’s primaries are a week away, but the state could force a do-over for voting on U.S. House races. A new congressional map in Tennessee upended races that had been underway for months. Republicans’ rush to gerrymander congressional districts across several Southern states after a U.S. Supreme Court ruling hollowed out the Voting Rights Act is confusing voters and creating logistical headaches for local election officials. The changes are hitting while primary season is in progress. The chaotic upheaval to an election season that could determine which party controls the U.S. House is the latest fallout from an intensely partisan gerrymandering battle initiated by President Donald Trump last year to protect Republicans’ slim majority.…