The U.S. Supreme Court declined on Friday to rule in a dispute involving a Louisiana electoral map that raised the number of Black-majority congressional districts in the state, with the justices ordering the case to be argued again.

The Louisiana case could affect the balance of power in a narrowly divided Congress and shape how states factor race into the creation of future electoral maps.

The justices asked that the case, which has implications for the political power of Black voters, be reargued next term.