Experts say this nationwide redistricting fight is the culmination of a 2019 U.S. Supreme Court decision ruling that federal courts cannot intervene in state gerrymandering cases, leaving it to the states to decide how to handle them.

The Supreme Court signaled Friday that it will take a broader look at a high-profile redistricting fight over Louisiana’s congressional map, subtly expanding the scope of an appeal that could weaken the landmark Voting Rights Act.