Missouri Supreme Court Upholds Republican-Led Redistricting Map in Unanimous Rulings

The Missouri Supreme Court issued three unanimous rulings on Tuesday, May 12, 2026, upholding a new congressional redistricting map passed by the state’s Republican-led legislature. The decision allows the new map to take effect immediately, a move that is expected to flip one congressional district to Republican control and significantly alter the state’s political landscape.

A Setback for Direct Democracy and Voter Referendums

The court’s decision deals a major blow to a months-long legal effort by voters to block the new map. Last fall, Missouri voters gathered more than 300,000 signatures in an attempt to exercise their right under the Missouri Constitution to veto the state legislation via a referendum election.

Despite the significant public effort, the court ruled against attempts to suspend the implementation of the new map while the referendum process is underway. This ruling allows the map to go into effect before voters can weigh in, a decision that has been noted as defying 100 years of precedent in Missouri.

Legal Challenges Over District Compactness

The redistricting plan, which received backing from President Donald Trump, remains the subject of intense legal scrutiny. In the case of Healey v. Missouri, plaintiffs are challenging the legality of the map and the specific configuration of its districts.

The Elias Law Group (ELG) is representing the plaintiffs in the Healey case, specifically focusing on the compactness of the newly drawn districts. ELG Firm Chair Marc Elias, who is also the founder of Democracy Docket, is leading the legal effort to contest the map’s composition.

Criticism of Judicial Conduct and Speed

Following the rulings, the National Redistricting Foundation (NRF) issued a sharp critique of the court’s proceedings. Marina Jenkins, Executive Director of the NRF, expressed concern over the speed with which the court reached its conclusions.

Jenkins noted that the oral arguments presented before the court on Tuesday morning lasted less than an hour and elicited zero questions from the justices for either the plaintiffs or the defendants. She suggested that the brevity of the proceedings indicated the court had already reached its decision before the arguments even began.

“While one might be inclined to hope that these justices managed to grapple with a highly complex, nuanced and consequential issue in just six hours, it seems clear the justices were not interested in the day’s proceedings and simply had their opinion already finalized even before this morning’s argument. With this decision, the Missouri Supreme Court has shown Missourians the lack of seriousness with which it takes cases that pertain to protecting their right to vote—a complete and dangerous abdication of the judiciary’s role.”

— Marina Jenkins, Executive Director of the NRF

The controversy surrounding the map stems from reports in July 2025 indicating that President Trump pressured Missouri Republicans to enact a mid-decade gerrymander. The plan involves splitting the 5th congressional district, which encompasses most of Kansas City, to create an additional Republican-leaning district. Despite opposition voiced during committee hearings, the Missouri House and Senate passed the proposal, and Governor Kehoe signed it into law.

Key Takeaways

• Unanimous Ruling: The Missouri Supreme Court issued three unanimous decisions on May 12, 2026, upholding the new congressional map.
• Political Impact: The new map is expected to likely flip one congressional district to Republican control.
• Referendum Denied: The court ruled that the map will take effect immediately, despite more than 300,000 signatures gathered for a voter referendum.
• Ongoing Litigation: The Elias Law Group continues to challenge the compactness of the districts in the Healey v. Missouri case.

As the new map moves toward implementation, the legal and political battles regarding Missouri’s congressional representation are expected to continue, particularly as voters prepare for the upcoming election cycle.