2025 California Proposition 50

California Proposition 50, officially known as the Election Rigging Response Act, is an amendment to the constitution of the U.S. state of California, which was passed by voters in a special election ballot on November 4, 2025. At the urging of California governor Gavin Newsom, the proposition was put on the ballot by the Democratic-controlled California State Legislature. Approved by 64.4% of voters, the proposition's purpose was to redraw the state's congressional districts, replacing the ones drawn by the bipartisan California Citizens Redistricting Commission during the earlier 2020 redistricting cycle. The new districts will be used for the 2026 United States House of Representatives elections through the 2030 elections. Following the 2030 census, congressional redistricting authority will return to the independent commission under the normal decennial process.

The map defined in Proposition 50 is a Democratic gerrymander claimed to intend to offset the gerrymander by Texas Republicans, both of which are part of the broader 2025–2026 United States redistricting effort. It redraws several congressional districts to incorporate larger shares of urban and suburban Democratic voters, increasing Democratic registration advantages in competitive districts and converting several Republican-leaning seats into Democratic-leaning ones. Republicans have responded to Proposition 50 with legislation, their own propositions, and litigation.

Republicans challenged the proposition in court both before the election, as well as after it was passed by the voters, but all their legal efforts failed and were exhausted in February 2026 when the Supreme Court of the United States refused to hear the appeal.