The U.S. Supreme Court ruled (pdf) Monday that race predominated the Republican redrawing of two of North Carolina’s congressional districts.

“This is a watershed moment in the fight to end racial gerrymandering,” said National Democratic Redistricting Committee (NDRC) chairman Eric Holder, the former attorney general. “North Carolina’s maps were among the worst racial gerrymanders in the nation.”

The opinion was written by Justice Elena Kagan, with conservative Justice Clarence Thomas joining the other liberal justices in the majority.

Their decision affirms a lower court’s ruling that found that the redrawing of the 1st and 12th Congressional Districts was “skillful mapmaking” that left ” traditional redistricting principles […] subordinated to race.” Bloomberg writes:

“In affirming the trial court’s decision,” says the Brennan Center for Justice, “the Court rebuffed North Carolina’s attempt to erect formalistic doctrinal barriers to racial gerrymandering claims, like its effort to have the question of intent turn on things like the shape of districts or whether towns or precincts were split.”

Doug Clark explains at the Greensboro News & Record:

Of the ruling, Rick Hasen writes a his Electionlaw blog: “Holy cow this is a big deal.” He continues:

According to Holder, “Today’s ruling sends a stark message to legislatures and governors around the country: Racial gerrymandering is illegal and will be struck down in a court of law.”

It’s also “a critical decision as communities prepare for the 2020 redistricting cycle, where states would still be able to purposely create legitimate majority-minority districts, consistent with this opinion,” said Kristen Clarke, president and executive director of the Lawyers’ Committee for Civil Rights Under Law.