California GOP asks Supreme Court to block Proposition 50 congressional map

The California Republican Party filed an emergency application with the U.S. Supreme Court seeking to stop the use of a new congressional map approved by voters under Proposition 50, arguing the measure and its maps unlawfully prioritized race in drawing district lines. The party asked Justice Elena Kagan, the justice assigned to the Ninth Circuit, to issue an injunction by Feb. 9 to prevent the state from implementing the map before candidate filing begins.

The application, submitted Jan. 20 and Jan. 21 by attorneys from the Dhillon Law Group, asks the court to temporarily reinstate the 2021 congressional map produced by the citizens-led independent redistricting commission while an appeal proceeds. Plaintiffs contend Proposition 50 created a racial gerrymander in violation of the Equal Protection Clause of the 14th Amendment, the 15th Amendment’s bar on racial discrimination in voting, and the federal Voting Rights Act.

The GOP and allied challengers first sued on Nov. 5, 2025, the day after voters approved Proposition 50. A three-judge federal panel rejected their claims in a 2-1 decision, concluding the evidence showed a partisan gerrymander rather than one based predominantly on race. With that ruling against them, the party has turned to the Supreme Court for interim relief through what is known procedurally as an emergency application in Tangier v. Newsom.

The stakes are immediate. The maps enacted under Proposition 50 redraw five districts in ways that are expected to favor Democratic candidates and are slated for use in the 2026, 2028 and 2030 congressional elections. Legal filings by the GOP argue that, without an injunction, state officials could "run out the clock" on filing deadlines and lock in districts the challengers call unconstitutional. California Republican Party Chairwoman Corrin Rankin wrote in filings and public statements, "Californians deserve fair districts and clean elections, not a backroom redraw that picks winners and losers based on race."

The emergency filing requests action by Feb. 9, the date cited as the start of California’s filing period for congressional candidates. Other key administrative dates include a candidate filing deadline of March 6 and a state primary on June 2. If the Supreme Court declines to intervene, election officials could proceed under the Proposition 50 lines for the 2026 cycle, potentially reshaping the balance in the U.S. House by as many as five seats according to estimates cited in legal pleadings.

The Justice Department has entered the litigation against the challengers, intervening to rebut the racial gerrymander claims and bolster the state's position. That federal involvement frames the dispute as not only a state contest over maps but one with national political and legal significance. Parties on both sides are signaling an expedited legal fight that could reach the Supreme Court on the merits as soon as the emergency phase is resolved.

This dispute in California is part of a broader national rhythm in which states and parties contest the boundaries of representation, and it touches on international norms about minority rights and the legal limits of race-conscious policy. For now, the immediate question is procedural: whether Justice Kagan will grant the interim injunction and restore the 2021 commission-drawn map while the courts work through the constitutional claims.