COLUMBIA, S.C. — An election-year redistricting movement has spread to South Carolina as Republicans attempt to redraw majority-Black congressional districts that have suddenly become susceptible because of a U.S. Supreme Court ruling upending protections for minority voters.

Urged on by President Donald Trump, South Carolina Republicans are attempting to redraw a district long held by a Black Democratic lawmaker in their quest for a clean sweep of the state’s seven congressional seats.

Lawmakers already are meeting in special sessions in Alabama and Tennessee in a bid to change their U.S. House districts. And Louisiana lawmakers also are making plans for new congressional districts after the Supreme Court last week struck down the state’s current map.

The high court’s ruling said Louisiana relied too heavily on race when creating a second Black-majority House district as it attempted to comply with the Voting Rights Act. The ruling significantly altered a decades-old understanding of the law, giving Republicans grounds to try to eliminate majority-Black districts that have elected Democrats.

The ruling revved up an already intense national redistricting battle ahead of a November midterm election that will determine control of the closely divided House.

Since Trump prodded Texas to redraw its U.S. House districts last year, a total of eight states have adopted new congressional districts. From that, Republicans think they could gain as many as 13 seats while Democrats think they could gain up to 10 seats. But some of the new districts could be competitive in November, meaning the parties may not get all they sought.

South Carolina to test its will for redistricting

Democratic U.S. Rep. Jim Clyburn has represented South Carolina’s 6th Congressional District since it was redrawn to favor minority voters in 1992. He’s running for an 18th term. But it could get harder for him to win reelection if Republicans redraw his district.

Leaders in the state House and Senate said a redistricting effort needs to start with a two-thirds vote in each chamber. The issue could come up as soon as Wednesday. But if only a few Republicans aren’t on board, it can’t succeed.

Senate Majority Leader Shane Massey has warned that redistricting could backfire because of thin political margins, resulting in a second Democrat in the U.S. House. Massey told reporters Tuesday that he had a cordial conversation with Trump about redistricting, each laying out their concerns.

The state’s primaries are June 9 and early voting starts in three weeks.

Alabama looks at setting a new primary

The House on Wednesday could debate legislation that would allow Alabama to hold a special congressional primary, if the Supreme Court clears the way for the state to change its U.S. House districts.

In light of the court’s ruling on Louisiana’s districts, Alabama officials have asked courts to set aside a judicial order to use a U.S. House map that includes two districts with a substantial number of Black voters. Republican instead want to use a map passed in 2023 by the Legislature that could help the GOP win at least one of those two seats currently held by Democrats.

Alabama’s primaries are scheduled for May 19. If the Supreme Court grants the state’s request after or too close to the primary, the legislation under consideration would ignore the results of that primary and direct the governor to schedule a new primary under the revised districts.

Democrats denounced the legislation as a Republican power grab that harkens back to the state’s shameful history of denying Black residents equal rights and representation.

Republicans are “working to secure an electoral victory by taking Alabama back to the Jim Crow era, and we won’t go back,” Democratic U.S. Rep. Terri Sewell told a crowd gathered outside the Alabama Statehouse.

Tennessee plan targets Memphis district

Republican Gov. Bill Lee called Tennessee lawmakers into a special session to consider a plan urged by Trump that could break up the state’s lone Democratic-held U.S. House district, centered on the majority-Black city of Memphis. Republicans didn’t say much about the plan Tuesday.

But as the Senate began work Tuesday, shouts of “shame, shame, shame” could be heard inside the chamber from protesters gathered in the hallways. On the chamber floor, Sen. Raumesh Akbari, a Black Democrat from Memphis, called the redistricting “an act of hate.”

Martin Luther King III sent a letter to Tennessee legislative leaders expressing “grave concern” about the plan to divide Memphis, saying the move could undermine the work for voting rights carried out by his father, Martin Luther King Jr.

The candidate qualifying period in Tennessee ended in March, and the primary election is scheduled for Aug. 6.

Thousands had already voted in Louisiana

After last week’s Supreme Court decision, Republican Gov. Mike Landry postponed the state’s May 16 congressional primary to allow time for lawmakers to approve new U.S. House districts. State Sen. Caleb Kleinpeter, a Republican, said a redistricting committee he leads plans to hold a public hearing Friday.

Louisiana voters had already sent in more than 41,000 absentee ballots by last Thursday, when Landry suspended the House primaries, according to the Secretary of State’s Office. That’s about one third of all the absentee ballots sent out to voters. Around 19,000 were from registered Democrats, 17,000 from registered Republicans and the remainder belonged to neither party.

Democrats and civil rights groups have filed several lawsuits challenging the suspension of Louisiana’s congressional primary.