May 15 (UPI) -- The U.S. Supreme Court's decision in the voting rights case Louisiana vs. Callais has added a new chapter in an ongoing redistricting battle across the country. The high court ruled on April 29 against a majority-Black congressional district in Louisiana, ordering that it was unconstitutionally drawn because race was used as a basis for redistricting. It has already set off a series of state-level moves that seek to immediately reshape elections, starting in Louisiana, where Gov.