Dhillon Law Group partner Mike Columbo (2nd L) speaks to reporters during a press conference announcing a federal lawsuit challenging Proposition 50 in Sacramento, Calif., on Nov. 5, 2025. Godofredo A. Vásquez/AP Photo

California Republicans filed a federal lawsuit Wednesday morning against Prop. 50, arguing that the state’s new congressional maps, which would benefit Democrats, violate the U.S. Constitution by racial gerrymandering.

The lawsuit asks the district court to permanently halt Gov. Gavin Newsom’s ballot measure—passed by voters Tuesday—from taking effect.

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