https://www.npr.org/2026/02/04/nx-s1-5691890/supreme-court-california-redistricting-map

The Supreme Court is allowing California to use its new congressional map for this year's midterm election, clearing the way for the state's gerrymandered districts as Democrats and Republicans continue their fight for control of the U.S. House of Representatives.

The state's voters approved the redistricting plan last year as a Democratic counterresponse to Texas' new GOP-friendly map, which President Trump pushed for to help Republicans hold on to their narrow majority in the House.

And in a brief, unsigned order released Wednesday, the high court denied an emergency request by the California's Republican Party to block the redistricting plan. The state's GOP argued that the map violated the U.S. Constitution because its creation was mainly driven by race, not partisan politics. A lower federal court rejected that claim.

snip

The Supreme Court has previously ruled that partisan gerrymandering is not reviewable by federal courts.

MY guess is that since they approved others, it was a little too far to say CA couldn't do it.