The Supreme Court on Monday weighed whether a Louisiana congressional map that includes two majority-black districts for the first time in decades is a lawful effort to comply with the Voting Rights Act or an unconstitutional racial gerrymander.

The U.S. Supreme Court grappled on Monday with 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.