The Missouri Supreme Court has unanimously blocked newly drawn congressional districts backed by President Donald Trump from being used in the November 2026 general election, dealing a significant blow to Republican redistricting efforts in the state. The court also ordered that Missouri voters get a statewide say on whether the districts should remain in place, adding a direct-democracy dimension to an already high-stakes election law fight.

The ruling is significant not just because of its political consequences, but because it underscores how state supreme courts continue to play a central role in policing redistricting disputes.

The Missouri Supreme Court has unanimously blocked the state’s newly enacted congressional map from taking effect in the November 2026 general election, holding that a referendum petition challenging the measure was both valid and timely. The practical result is significant: unless Missouri voters approve the new map, the state will continue using the prior post-2020 census congressional boundaries.

The dispute centered on whether opponents of the map had properly invoked Missouri’s referendum process to suspend the law before it could be implemented.