In Louisiana v. Callais, the Supreme Court ruled 6-3 that race-based gerrymandering of congressional districts is not a compelling governmental interest.

The lower court found that the map was guided too much by racial considerations in violation of the constitutional promise of equal protection under the law.

The lower court found that the map was guided too much by racial considerations in violation of the constitutional promise of equal protection under the law.

April 29 (UPI) -- The U.S. Supreme Court on Wednesday struck down Louisiana's newly drawn congressional map as an unconstitutional racial gerrymander in a ruling that Democrats and civil rights advocates say gutted a key provision of the landmark Voting Rights Act.