Federal courts are unlikely to play a significant role in resolving disputes over partisan gerrymandering, after a 2019 landmark Supreme Court decision sidelined judges.

The Supreme Court is still deciding how to resolve a dispute over Louisiana’s congressional districts that involves an interplay between the Voting Rights Act and a racial gerrymandering challenge.

The Supreme Court announced on Thursday that it would block for now a federal appeals court ruling that would sharply curtail the Voting Rights Act by limiting who can sue to enforce protections ...