For years, Democratic Rep. Al Lawson’s Florida district has stretched like a rubber band from Jacksonville to Tallahassee, scooping up as many Black voters as possible to comply with requirements that minority communities get grouped together so they can select their own leaders and flex their power in Washington.

But the state’s Republican governor, Ron DeSantis, took the unusual step of asking Florida’s Supreme Court whether Lawson’s plurality-Black district can be broken up into whiter — and more Republican — districts. The court on Thursday declined to get involved.

That type of request might typically face steep hurdles under state and federal laws that are meant to protect representation of marginalized communities in the nation’s politics. But the ground rules may be shifting after the U.S. Supreme Court sided this week with Republicans in Alabama to block efforts to ensure that Black voters are adequately represented in Congress by adding a second majority-Black district in the state.

The ruling stunned civil rights groups, who have watched the court’s conservative majority steadily eat away at the Voting Rights Act for decades. While the law’s rules governing how to draw legislative lines based on race still stand, advocates worry the justices are prepared to act with renewed fervor to eliminate remaining protections in the landmark civil rights legislation. That, some worry, could embolden Republicans in places like Florida to take aim at districts like Lawson’s and ultimately reduce Black voters’ influence on Capitol Hill.