The Supreme Court has blocked Missouri’s Trump-backed congressional map for a third time this month, saying a late switch would spark electoral chaos as ballots already go out.
In an unsigned opinion Friday, the justices rejected another bid to restore the 2025 map for the November midterms and left Missouri on the congressional lines adopted after the 2020 census.
That means the state will run its general election under a different map than the one used in its August primary, a split Newsweek reported after the high court again stepped in.
The court pointed to a simple reality on the ground. Ballots were already out. Voting had started. Election officials said a last-minute flip was practically impossible.
Republicans had approved the new map in 2025 with backing from President Donald Trump and hoped it would open a path to a seventh U.S. House seat. They now hold six of Missouri’s eight seats.
The justices did not bury the lead. Switching maps this late, they wrote, would create “electoral chaos.”
Their unsigned opinion stated the practical facts in plain terms: “Ballots using the 2022 map have been printed and mailed.”
"Ballots using the 2022 map have been printed and mailed,"
And: “Absentee voting has already begun, as has military and overseas voting.”
"Absentee voting has already begun, as has military and overseas voting."
Missouri election officials, as cited in the ruling, called a revert to the 2025 map “practically impossible” at that stage.
So the November contest stays on the same district lines voters used in 2022 and 2024. The 2025 map is sidelined for this cycle’s general election.
Missouri Republican Gov. Mike Kehoe did not hide his frustration. He posted Friday on X that the ruling leaves the state with mismatched maps for primary and general elections.
Kehoe wrote:
"It is disappointing that today’s decision by the United States Supreme Court means Missouri will conduct its November general election under a different congressional map than its primary election. Voters deserved consistency and certainty, and not for the rules to be changed between elections. Nevertheless, Missouri will follow the Court’s order."
That is the core complaint from the state’s Republican leadership: primary voters cast ballots under one set of lines, and general-election voters will use another.
Friday’s order was the third Supreme Court rejection of the restoration push this month. The path there was a stack of conflicting state and federal rulings.
Missouri lawmakers passed the new congressional map in 2025. On Aug. 4, the legal deadline and the same day the new districts were used in the primaries, Republican Secretary of State Denny Hoskins rejected a petition seeking a statewide vote on the map. He took the position that referendum petitions could not be used for congressional redistricting.
On Sept. 3, the Missouri Supreme Court ruled the map could not take effect unless voters approved it in a referendum. The state high court ordered officials to use the post-2020 census districts for the 2026 election, found the referendum petition valid, and ordered Hoskins not to use the new map.
On Sept. 8, the U.S. Supreme Court let that Missouri Supreme Court ruling stand. Later the same day, U.S. District Judge Stephen Clark issued a conflicting order requiring the state to use the 2025 map.
On Sept. 10, the U.S. Supreme Court blocked Clark’s order. That same day, the Missouri Supreme Court temporarily held Hoskins in contempt after he directed local election officials to use the new map in response to Clark’s directive.
Then, on Sept. 21, the 8th U.S. Circuit Court of Appeals ruled for the Trump-backed map and directed the district court to require its use in November. Friday’s Supreme Court order blocked that change too.
At least 16 lawsuits have been filed in state and federal courts over Missouri’s congressional redistricting. The back-and-forth left election officials scrambling while absentee and military ballots moved forward on the older lines.
The 2025 map significantly reshaped Missouri’s 5th Congressional District, which includes much of the Kansas City area. New boundaries removed portions of Kansas City from the district and pushed the lines farther east into rural Republican areas.
Democratic Rep. Emanuel Cleaver, who represents the 5th, ran unopposed in the Democratic primary and remains on the general-election ballot even as the boundaries shift back for November.
Republican State Sen. Rick Brattin won the GOP primary for the 5th under the revised boundaries and also remains a general-election candidate. Brattin, Republican Rep. Bob Onder, and two other voters were plaintiffs in the federal lawsuit that produced the 8th Circuit ruling and the latest appeals to the Supreme Court.
The court fight did not end the political fight. Missouri voters are still set to decide in November whether to approve the 2025 map.
Richard von Glahn, executive director of People Not Politicians Missouri, the group behind the statewide referendum, told Newsweek the group was finished with what he called an end-run around the state constitution.
Von Glahn said:
"We are done with corrupt politicians trying to force their map into effect outside the process outlined in the Missouri constitution,"
He added:
"We have said from the beginning, people, not politicians will be the final deciders on this DC power grab. We are moving forward to vote NO on Proposition A."
Republican map-makers wanted a clearer shot at another House seat before the midterms. Opponents forced the dispute onto the referendum track and into the courts. The Supreme Court’s Friday order locks in the older districts for the general election while that ballot question goes forward.
The practical result is straightforward. Missouri used the new districts in August. It will use the 2022 lines in November. Candidates who ran under one map will now compete under another.
Hoskins’s August rejection of the referendum petition, the state supreme court’s September orders, Clark’s conflicting federal order, the contempt finding, the 8th Circuit’s late directive, and three separate U.S. Supreme Court interventions all landed while ballots were already being prepared and mailed.
By the time the justices wrote Friday, the election machinery was moving. Printed ballots, absentee voting, and military and overseas ballots left little room for a clean midstream swap.
Kehoe accepted the order while objecting to the inconsistency it locked in. Von Glahn cast the outcome as a win for the referendum process. The high court cast it as a guard against chaos once voting has begun.
When maps change after ballots are in the mail, voters pay the price in confusion, and courts that wait until the last minute leave states stuck with split rules instead of clear ones.
