New Supreme Court ruling halts Republican congressional redistricting plan in Missouri

The U.S. Supreme Court upheld on Friday the decision to prevent the state of Missouri from using a congressional map redrawn in 2025 for the November legislative elections.

The unsigned ruling, issued without any recorded dissenting opinions, marks the third time this month that the nation's highest court has intervened in litigation regarding the state's district boundaries.

The court's order requires local authorities to use the electoral map that has been in effect since 2022. The justices noted that modifying the geographic boundaries of the districts at this stage would cause confusion in the administration of the process, emphasizing that "the process is not only approaching, but has already begun" through the mailing of ballots to overseas voters and the start of absentee voting.

The ruling responds to the series of legal appeals triggered by the unanimous decision of the Missouri Supreme Court, which determined that the state law required the use of the 2022 map because the bill passed in September 2025 by the legislature was subject to a referendum process initiated by citizens.

The origin of the dispute and the course of appeals

The map drawn in 2025 divided the urban core of Kansas City with the aim of altering the balance of representation in the 5th congressional district. Local opponents collected signatures to put the law to a referendum, freezing the implementation of the new law under the provisions of the state constitution.

Despite the state court's ruling, the controversy escalated to federal courts after an appeals court held that the election must align with the district boundaries used during the August primary.

The Supreme Court's final ruling overturned that decision, noting that the precedents established throughout the month made it clear that priority should be given to avoiding last-minute changes that could undermine voter certainty.

Election scenario and logistics in local government

Missouri Attorney General Catherine Hanaway had argued before the justices that altering the map at this stage would hinder preparations for Election Day. However, the attorney general herself acknowledged that the state had already printed and mailed ballots to military personnel and citizens residing abroad based on the 2022 district boundaries.

Under the district boundaries that will govern the November elections, projections indicate that the Republican caucus will have an advantage in retaining six of the state's eight seats in the House of Representatives, while the Democratic Party will maintain its strongest chances in the Kansas City and St. Louis metropolitan areas.