Washington: The administration of U.S. President Donald Trump has initiated legal action to block California's newly approved congressional map by suing the state and joining a Republican-led lawsuit against Proposition 50 (Prop 50). This voter-endorsed measure has the potential to impact several U.S. House seats in the upcoming 2026 mid-term elections, as revealed by federal court documents and official announcements.
According to Namibia Press Agency, the U.S. Department of Justice (DOJ) filed a complaint in federal court, arguing that the map implemented under Prop 50 constitutes a "race-based redistricting plan" that infringes upon the 14th Amendment's Equal Protection Clause and the federal Voting Rights Act. U.S. Attorney General Pamela Bondi criticized California's strategy as a "brazen power grab" that infringes on civil rights and undermines the democratic process, as stated in a DOJ press release.
The DOJ aims to intervene as a plaintiff in the case of Tangipa v. Newsom, a lawsuit initiated on November 5 by the California Republican Party and 19 voters. This suit alleges that the Prop 50 map amounts to an unconstitutional racial gerrymander designed "to favor Hispanic voters," as reported by Democracy Docket, a tracker of voting rights litigation.
The federal government has requested judges in the Central District of California to prevent the new districts from being used in the 2026 election cycle and to declare that Prop 50 was adopted in a manner that infringes upon voting rights based on race, according to Democracy Docket's overview of the DOJ motion and complaint.
Prop 50 permits the California legislature to substitute the existing U.S. House map-originally drawn by an independent citizens' commission-with a new map for the 2026, 2028, and 2030 elections. After the subsequent national census, control would revert to the commission, as detailed in the state's official voter guide and analysis by the University of California, Berkeley's Institute of Governmental Studies.
The measure was conceived as a counteraction to mid-decade redistricting efforts in Republican-led states. The constitutional findings noted that Trump had encouraged Republican officials in Texas to redraw districts in August to "rig the 2026 United States midterm elections," characterizing Prop 50 as a "temporary" countermeasure, according to the amendment text published by the California legislature.
Governor Gavin Newsom signed the legislative package on August 21, calling it the "Election Rigging Response Act." He asserted that Californians deserved an opportunity to "fight back" against what he described as Trump's attempts to undermine the democratic process.
The "Yes on 50" campaign, funded by Newsom's ballot-measure committee and supported by the California Democratic Party along with major labor and civil rights organizations, encouraged voters to adopt what it termed "temporary, emergency congressional district maps to counter Donald Trump's scheme to rig next year's congressional election," according to the campaign website.
Despite multiple pre-election lawsuits aiming to block the ballot measure or halt the legislature's map, state courts, including the California Supreme Court, permitted the special election to proceed, Democracy Docket reported. On November 4, Californians approved Prop 50 with approximately 64 percent of voters in favor, based on official returns compiled by Ballotpedia.
Local news outlets indicated that the new map could counteract Republican gains from redistricting in states like Texas. Berkeley's Institute of Governmental Studies projected that the districts might offer Democrats a chance to secure up to five additional U.S. House seats, though final outcomes will depend on future elections.
On Wednesday, the Democratic Congressional Campaign Committee, which played a role in developing the map, received court permission to intervene in Tangipa v. Newsom to defend Prop 50.