Here’s the latest. The Supreme Court appeared poised on Wednesday to upend a key provision of a landmark civil rights law by prohibiting lawmakers from using race as a factor in drawing voting maps, which could spark widespread redistricting efforts. If the justices determine that lawmakers may not consider race in drawing districts, the repercussions for the country’s political balance could be sweeping, allowing Republican state legislatures to eliminate at least a dozen Democratic-held House districts across the South.