The U.S. Supreme Court blocks Missouri officials from using the state’s 2025 congressional map passed by Republicans, ordering that Missouri return to district lines adopted in 2022 for the upcoming election cycle. The Court issues a stay of a federal judge’s temporary order, leaving the dispute to continue on appeal rather than resolving the underlying merits.

The conflict stems from Missouri House Bill 1 (HB 1), approved during a 2025 special session. Missouri Secretary of State Denny Hoskins rejected a citizen petition seeking a statewide referendum on HB 1, and the Missouri Supreme Court later ruled the petition was timely and valid, meaning HB 1 “did not go into effect” unless and until voters approve it at the November 2026 general election. Opponents say the referendum should control, while Hoskins argues constitutional limits on how voters can affect federal election rules.

After the state supreme court decision, a federal district judge briefly required use of the 2025 map, creating competing instructions for election administrators. The U.S. Supreme Court’s order does not decide standing, whether a three-judge federal panel is required, or the substantive constitutional questions. Missouri voters will elect representatives using the 2022 map, and Proposition A will ask voters whether to adopt HB 1.