A Missouri judge ruled Wednesday that a new congressional map enacted by Republicans and backed by President Donald Trump can be used in the November midterm elections.

Cole County Circuit Judge Daniel Green rejected a challenge seeking to place the map on a statewide referendum ballot. The decision clears the way for the Republican-favorable districts to take effect without further delay.

The ruling came in response to a lawsuit filed after Secretary of State Denny Hoskins refused to certify petitions for a referendum on House Bill 1. That legislation, passed during a 2025 special session, redraws Missouri's eight U.S. House districts in a manner expected to strengthen the GOP's position.

Green held that Missouri's Constitution assigns congressional redistricting to the legislature and does not permit voters to override such maps through referendum. He also cited practical concerns, including election deadlines and the fact that congressional primaries have already occurred.

Republicans currently hold six of Missouri's eight House seats. The new map is part of a broader effort by the Trump administration and GOP-led states to adjust boundaries ahead of the 2026 midterms.

Opponents, including the group People Not Politicians, said they will appeal the decision to the Missouri Supreme Court. The court has indicated it will handle related redistricting matters on an expedited basis.

The map has faced multiple legal challenges since its passage, including earlier rulings that allowed it to be used in the August primaries. Wednesday's decision represents another victory for supporters of the redrawn lines.