A federal appeals court ruled on Monday, September 21, 2026, that Missouri must implement its 2025 Republican-drawn congressional map for the November 3 general election. The Eighth Circuit panel argued that reverting to older district lines after holding August primaries under the new map violates the U.S. Constitution.
A high-stakes legal battle over Missouri’s congressional boundaries took another turn on Monday when a three-judge panel of the Eighth U.S. Circuit Court of Appeals issued a ruling favoring the 2025 map. The decision delivers a pickup opportunity for Republicans seeking to expand their advantage in the House ahead of the midterm elections.
Yet the ruling does not immediately change how ballots are cast. The federal appellate panel delayed the effect of its order for one week, giving the U.S. Supreme Court time to intervene until Sept. 28 at 5 p.m. Central Time. Meanwhile, local election authorities have already transmitted absentee ballots to overseas citizens and military voters using older district lines, following earlier directives from the Missouri Supreme Court.
Constitutional Continuity and the Single-Election Doctrine
At the core of the Eighth Circuit’s decision lies a strict interpretation of federal election law. The court affirmed a lower district judge’s finding, ruling that primary and general elections function as a single continuous process for choosing federal representatives.
Because the state conducted its August 4 primary using the 2025 districts, the majority concluded that switching to a different map for the general election would violate Article I, Section 2 of the Constitution, which guarantees voters an equal voice.
The court pointed to estimates showing that more than 1.4 million Missouri residents live in different districts depending on which map is applied. Approximately 284,000 voters cast primary ballots in districts that would differ entirely from those drawn under the older 2022 lines. In the 5th Congressional District, for instance, 57% of residents under the 2025 map would find themselves moved elsewhere under the older boundaries.
Clashing Courts and Uncharted Legal Territory
Monday’s federal ruling directly collides with an earlier decision from the state’s highest court. The Missouri Supreme Court previously ordered state officials to proceed with a GOP-favored 6-2 map, ruling that the newer 7-1 design could not be enforced unless voters approved it in a statewide referendum.
Legal experts warn that the dueling mandates have plunged local administrators into chaos. Dave Roland, senior legal advisor at the Freedom Center of Missouri, noted that the state is flying by the seat of its pants while attempting to navigate simultaneous, contradictory orders from state and federal judges.
The procedural tangle deepened when U.S. District Judge Stephen Clark granted a temporary restraining order in a lawsuit brought by U.S. Rep. Bob Onder. Clark barred Secretary of State Denny Hoskins from using any map other than the 2025 version. Hoskins announced he would comply with the federal order, prompting the Missouri Supreme Court to order Hoskins to appear for a contempt hearing.
Missouri Attorney General Catherine Hanaway’s office representing Hoskins argued that voter confusion and ongoing disruptions to election preparations inflict irreparable harm on the state, urging federal courts to override the state judiciary. Conversely, opponents argue that federal intervention disrupts the established status quo.
Secretary Hoskins has already sent the certification to local election authorities and directed local election clerks to begin implementing the Missouri Supreme Court’s order using the 2022 Map.
People Not Politicians, legal team
Next Steps at the U.S. Supreme Court
The dispute now heads back to Washington for a third time in as many weeks. Following the Eighth Circuit’s decision, the ballot-referendum advocacy group People Not Politicians announced it will file an emergency appeal to the U.S. Supreme Court.
The high court has twice previously sided against the Trump-backed map, though justices have not provided public explanations for their temporary blocks. With the state’s legal expenses mounting, reform advocates have called for an end to the protracted litigation.
Unless the U.S. Supreme Court intervenes or alters the injunction before the seven-day stay expires, Secretary Hoskins and local authorities must fully implement the 2025 map just weeks before voters head to the polls on November 3.