Missouri Supreme Court Blocks Trump-Backed Congressional Map Ahead of 2026 Midterms

The Missouri Supreme Court has unanimously blocked a Republican-backed congressional redistricting map supported by President Donald Trump from being used in the November 2026 midterm elections. The ruling is a significant setback for Republicans, who had hoped the new boundaries would improve their chances of gaining another U.S. House seat.

Court Blocks New Map for November Election

Missouri’s highest court ruled that the newly drawn congressional districts cannot be used in the November general election unless they are first approved by voters through a statewide referendum.

As a result, the congressional map based on the previous district boundaries will remain in effect for the 2026 general election.

Trump-Backed Redistricting Plan

The new map was developed by Missouri Republicans following Trump’s push for mid-decade redistricting in Republican-controlled states.

One of its major effects was to reshape Missouri’s 5th Congressional District, represented by Democrat Emanuel Cleaver, making the district significantly more favorable to Republicans. The broader Republican strategy was aimed at potentially securing an additional seat in the U.S. House.

Referendum Becomes Central to the Dispute

The court’s decision focused heavily on a citizen-led referendum effort challenging the new congressional boundaries.

Opponents collected more than 300,000 signatures seeking to put the redistricting plan before voters. Missouri Secretary of State Denny Hoskins had rejected the referendum petition, arguing that the process could not be used to challenge congressional maps.

The state Supreme Court disagreed and ruled that the referendum was legally valid.

Republicans Plan Supreme Court Appeal

Missouri Republicans have vowed to challenge the ruling at the U.S. Supreme Court.

Attorney General Catherine Hanaway criticized the decision and said her office would seek federal intervention. The appeal could create another legal battle over Missouri’s congressional districts just weeks before the midterm election.

Election Complications After August Primaries

The ruling creates an unusual situation because Missouri’s August primary elections were conducted using the new congressional map.

Candidates therefore participated in primaries based on district boundaries that the state Supreme Court has now blocked from being used in the November general election.

The change could force candidates, election officials and voters to adjust to the older district boundaries for the general election.

A Bigger Battle Over House Control

The Missouri dispute is part of a broader national fight over congressional redistricting ahead of the 2026 midterms.

Republicans and Democrats are pursuing map changes in several states as both parties seek an advantage in the battle for control of the U.S. House. Missouri’s ruling represents a notable legal setback for Trump’s redistricting strategy.

What Happens Next?

The immediate focus will be on the expected appeal to the U.S. Supreme Court and the referendum process.

Unless the ruling is overturned or otherwise changed, Missouri will use its previous congressional map for the November election, while voters will have an opportunity to decide the fate of the new map through the referendum process.

Bottom Line

The Missouri Supreme Court’s decision prevents the Trump-backed congressional map from being used in the November 2026 midterms, preserving the previous district boundaries for now. Republicans are preparing an appeal, while the referendum fight could determine whether the new map eventually takes effect.