The U.S. Supreme Court heard arguments on Monday in a bid by Louisiana officials and civil rights groups to preserve an electoral map that raised the number of Black-majority congressional districts in the state and prompted a challenge by non-Black voters.

The U.S. Supreme Court deliberated a controversial Louisiana electoral map case involving increased Black-majority districts. A lower court initially found the map violated constitutional equal protection laws,

States must balance complying with a civil rights law that protects the voting power of a racial minority while not discriminating against other voters.