California GOP asks Supreme Court to block House map ahead of midterm elections

The move comes after a lower court ruled last week that the map, adopted after Proposition 50 overwhelmingly passed last year, is lawful and can be used.

Gov. Gavin Newsom (D-CA) speaks during a campaign event on Proposition 50, Saturday, Nov. 1, 2025, in Los Angeles. (AP Photo/Ethan Swope)

The California GOP unsuccessfully argued before that court that the map should be blocked because it was racially gerrymandered and favored Latinos over other groups of voters. Two judges on the three-judge panel sided with Gov. Gavin Newsom (D-CA) and Democrats in Congress, who argued that the map was drawn solely to give their party an advantage after Texas changed its map to benefit Republicans at President Donald Trump‘s public urging. 

“The evidence presented reflects that Proposition 50 was