In a 6-3 ruling split along ideological lines, the conservative-dominated court struck down a map that creates a second majority-Black district in Louisiana, finding it amounted to an unconstitutional racial gerrymander despite being drawn to comply with the 1965 Voting Rights Act.

The court's decision in Louisiana v. Callais takes the teeth out of the Voting Rights Act, making it nearly impossible to draw new minority districts.

The decision will make it more difficult to successfully challenge legislative maps for diluting the voting power of racial minorities.