The court's repudiation of a lower court decision was only the latest case in which it has played a role in changing the congressional maps for Louisiana, Texas, Virginia, and California.
Opponents say the plan dilutes the power of Black voters around Kansas City and vow to block it in court or with a referendum. The governor, who's expected to sign the plan, says it reflects the state's conservative values.
A federal court says Alabama can't use a congressional map it found unconstitutional. The ruling comes in a voting rights case that resulted in the state getting a second Black member of Congress.
The case is nearly identical to a case the court ruled on two years ago from Alabama, though the outcome could make it more difficult for minorities to prevail in redistricting cases.
A federal district court ruled that the new map drawn by the state legislature violated the Voting Rights Act by diluting the Black vote. A group of conservatives challenged the legislature's map.
