COLUMBIA, S.C. (AP) — Republicans are rapidly pursuing redistricting efforts across the South following a U.S. Supreme Court ruling that affects majority-Black congressional districts. South Carolina, Alabama, Tennessee, and Louisiana are all considering changes. In South Carolina, Republican leaders are targeting a district held by a longtime Black Democratic lawmaker. Alabama is debating legislation for a special congressional primary. Tennessee lawmakers are in a special session to consider a plan that could divide Memphis, a majority-Black city. Louisiana has postponed its congressional primary to allow time for a new redistricting plan. Democrats and civil rights groups are challenging these moves.