In Louisiana, where nearly one-third of the state’s population is Black, GOP lawmakers approved a map containing five majority-white districts, all of which favor Republican incumbents.

For many redistricting experts, who counts as Black in voting maps has not ... the kind of Black-white binary that has been more pervasive in other parts of the United States.

Those states are identified in the following map: LaGarrett J. King, the founding director of the center said that many of these Black history mandates are often more of a symbolic gesture.

A three-judge panel of the U.S. District Court for the Northern District of Alabama approved a map that increases the percentage of Black voters in one of the state’s six majority-white ...