A Missouri judge ruled Tuesday that new congressional district maps backed by President Donald Trump will take effect for the November midterm elections, rejecting a citizen-led effort to send the Republican-friendly redistricting plan to a statewide voter referendum.

The ruling ensures that the congressional map signed into law by Governor Mike Kehoe last September will govern this year's House races, potentially strengthening Republican control of Missouri's delegation to Washington. The new boundaries dismantle the safely Democratic 5th Congressional District, which includes Kansas City, spreading urban Democratic voters across multiple districts.

Trump-Backed Map Moves Forward

Governor Kehoe called a special legislative session in August 2025 specifically to redraw Missouri's congressional districts. The resulting map won Trump's endorsement and passed the Republican-controlled legislature before being signed into law on September 28, 2025.

Under the new boundaries, Trump would have carried the reconfigured 2nd district by 11 points in 2024, compared to the 8-point margin he posted under the previous map. The changes move the 2nd district further into southern Missouri, consolidating Republican strength in a district that had been competitive in recent cycles.

Referendum Effort Derailed

The advocacy group People Not Politicians submitted more than 305,000 signatures in December 2025 seeking to place the new map before voters as a veto referendum. Missouri law requires signatures equal to 5 percent of votes cast for governor in the last election, collected across six of the state's eight congressional districts.

Tuesday's court ruling blocks that referendum from appearing on the November ballot, allowing the new districts to take immediate effect. The decision hands Republicans a significant procedural victory as they seek to protect and expand their House majority in the midterms.

Impact on November Elections

The timing of the ruling gives candidates just over two months to campaign under the finalized district lines. Primary elections are already underway in several Missouri districts, with voters set to choose nominees who will compete in the reconfigured congressional map this fall.

Democrats had hoped that a statewide referendum would give voters the chance to reject what they characterized as partisan gerrymandering. With that path now closed, opposition to the maps will have to be channeled through individual House races in November rather than a direct up-or-down vote on the redistricting plan itself.