The California Republican Party, Assemblyman David Tangipa and 18 California voters filed a federal lawsuit early Wednesday to challenge Prop 50, alleging it unconstitutionally gerrymanders districts in violation of the 14th and 15th Amendments.

Proposition 50, a ballot measure about redrawing the state’s congressional districts, was crafted by Democrats in response to Trump urging Texas and other GOP-majority states to modify their congressional maps to favor Republicans, a move that was designed to maintain Republican control of the U.S. House of Representatives.

Proposition 50, backed by Gov. Gavin Newsom and the state’s Democratic Legislature, asked voters to replace the state’s independently drawn congressional districts with new maps

California voters approved Proposition 50 on Tuesday, Nov. 4, in a statewide special election that was announced less than three months prior. And in about a year, Californians will be back at the polls.

California voters went to the polls to decide on a redistricting plan with national implications, but the campaign is shaping up to be a referendum on President Trump.

Republicans wasted no time taking Gavin Newsom to court today after last night’s big Proposition 50 win for the ambitious California governor Still, even after Donald Trump late Tuesday threatened California’s successful redistricting measure with legal action,

House Speaker Mike Johnson told RealClearPolitics on Wednesday that the passage of Proposition 50 in California isn't going to stop Republicans from campaigning "like warrior poets" there. "It is very important to point out that what California did is much different than the red states.

California voters gave Democrats — and possibly Gov. Gavin Newsom — a major win Tuesday by passing a plan that could help give them five House seats in 2026.