The remaking of the U.S. political map intensified this week as Southern states accelerated mid-decade redistricting efforts in the aftermath of an April 29 U.S. Supreme Court decision, with courts and legislatures across the region reshaping congressional districts in ways that tilt the playing field toward Republicans ahead of the November midterm elections.

The week’s most dramatic action came in Virginia, where the state Supreme Court in a 4-3 decision Friday voided a Democratic-drawn congressional map that voters had approved in April. The map would have positioned Democrats to compete for 10 of the state’s 11 House seats — a substantial jump from the six seats the party currently holds. The court majority ruled that lawmakers had failed to follow the state constitution’s procedural requirements for placing a constitutional amendment on the ballot, finding that the General Assembly’s initial approval came in October after early voting for the general election had already begun. The amendment needed to be approved once before and once after a legislative election; the court said that standard was not met. With the map struck down, Virginia’s previous district lines will remain in effect for the 2026 elections.

The Virginia ruling capped a week in which Republican-controlled legislatures across the South moved rapidly to capitalize on the U.S. Supreme Court’s decision last month in a Louisiana redistricting case. That ruling — handed down April 29 — struck down a Louisiana congressional district drawn to have a Black majority of constituents, a decision widely regarded as undercutting Section 2 of the Voting Rights Act, which requires political maps to include districts where minority populations’ preferred candidates can win elections.

Louisiana responded by suspending its primaries, originally scheduled for May 16, so that lawmakers could draft new district lines. Voting rights activists packed the statehouse to oppose proposals that could eliminate at least one of the state’s two current majority-Black congressional districts.

In Alabama, Republican lawmakers enacted a law Friday that would allow the state to disregard the results of its May 19 congressional primaries and hold a new election — but only if a federal court agrees to lift an existing order requiring Alabama to maintain a second congressional district where a majority or near-majority of residents are Black. Republicans currently hold four of the state’s six House seats; the proposed remap could position the party to pick up a fifth. Alabama’s move depends entirely on federal judicial action that has not yet occurred.

South Carolina’s GOP-controlled legislature met Friday to weigh a proposal that would give the party a shot at winning all seven of the state’s House seats. The plan would dismantle the one district currently held by a Democrat. Some Republican lawmakers expressed concern, however, that breaking up the Democratic-held seat could make other districts more vulnerable to Democratic gains — a strategic calculation that left the outcome uncertain as of Friday evening.

Tennessee moved faster. On Thursday, Governor Bill Lee signed into law a new congressional map that carves up the majority-Black district centered in Memphis, the state’s only Democratic-held House seat. The result gives Republicans a strong chance of winning all nine of Tennessee’s congressional districts, a consolidation that would eliminate one of the few remaining Democratic footholds in the Deep South’s congressional delegation.

These moves are part of a larger, unusual mid-decade redistricting wave that began earlier in the current Congress. Normally, House district lines are redrawn only once a decade, after the U.S. Census. This time, the process has been accelerated by political pressure from both parties. President Donald Trump urged Texas officials to draw new districts favorable to the GOP; Texas complied with a plan projected to yield the party as many as five additional seats. Democratic-controlled California responded with its own map, designed to produce as many as five new Democratic seats. Other states followed.

The Associated Press reported that, without counting the pending changes in Alabama, Louisiana, and South Carolina, the mid-decade redistricting has produced 14 additional House seats that Republicans believe they can win, against six that Democrats see as favorable — a net shift of roughly eight seats toward the GOP. Currently, Republicans hold 217 House seats to Democrats’ 212, with one independent member and five vacancies. A swing of even a handful of seats could determine control of the chamber in an election year when the president’s party historically loses ground.

But the changes are not yet final. The Alabama and South Carolina proposals depend on legislative negotiations and, in Alabama’s case, federal court action. Louisiana’s new maps have not been finalized. And legal challenges to the Voting Rights Act implications of the Tennessee and Louisiana redistricting efforts are widely anticipated from civil rights groups. As the week’s cascade of court rulings and legislative maneuvers demonstrated, the map — and the balance of power — remain in motion.