Tangipa v. Newsom

Tangipa v. Newsom (No. 2:25-cv-10616) challenges the congressional map that California voters approved through Proposition 50 on 4 November 2025. The plaintiffs, David Tangipa, other voters and the California Republican Party, argue the map deliberately concentrates Latino voters to shore up Democratic support, in breach of the Fourteenth and Fifteenth Amendments. The United States joined as a plaintiff-intervenor in November 2025.

A three-judge federal court in the Central District of California refused a preliminary injunction on 14 January 2026, by 2-1, with Circuit Judge Kenneth Lee dissenting. The plaintiffs appealed directly to the Supreme Court and asked it to block the map pending appeal; the Court denied that request on 4 February 2026 (No. 25A839).

The denial left the Proposition 50 map in force for the 3 November 2026 House elections. Proposition 50 requires the Legislature's August 2025 maps through 2030 and returns map-drawing to the Citizens Redistricting Commission in 2031, so the case's merits matter most for the elections up to 2030.