The Supreme Court on Friday blocked Missouri from using its Trump-backed congressional map for the third time. The state's Nov. 3 House elections will run on the districts voters used in 2022 and 2024. The unsigned opinion, with no noted dissents, set aside a federal appeals court ruling that would have revived the Republican-drawn 2025 map, PBS News reported.
The ruling turns on timing, but its consequences reach further. For this election, it spares a Kansas City district Republicans tried to carve apart. It also leaves the map's future where a citizen petition drive demanded it go: before Missouri voters in November. The losers are the state officials who pressed ahead despite known legal risks, and a party that had counted on turning a 6-2 Republican House delegation into 7-1.
What the court decided
The justices let stand a Missouri Supreme Court ruling that a citizen referendum petition suspends the new districts unless voters approve them. The state court held that the suspension reaches back to December, according to Courthouse News Service. Under Missouri's referendum process, a new law stays frozen until a statewide vote once petitioners gather enough signatures, Talking Points Memo noted.
The opinion told the federal district and appeals courts not to block the 2022 map and not to order Missouri to use the 2025 map this year, CBS News reported. In the court's words, as reported by CBS, "the election is not merely upcoming; it has already started."
Ballots on the 2022 lines had already been printed and mailed, including to military and overseas voters. Missouri faced a Sept. 19 federal deadline to send ballots to those voters, and absentee voting by mail and in person began Tuesday. "At this late date, ordering reversion to the 2025 map in the midst of an ongoing election would usher in electoral chaos," the court's opinion said, according to PBS News.
The justices also rebuked the 8th U.S. Circuit Court of Appeals. On Monday, a panel that Talking Points Memo described as made up entirely of Republican appointees turned a temporary injunction the high court had already stayed into a permanent one. "Given this court's two prior orders in this litigation, our conclusion that this was error should come as no surprise," the Supreme Court wrote in its per curiam opinion, Courthouse News reported.
How the state's choices shaped the chaos
The opinion pointed to decisions by Missouri's top election official. Republican Secretary of State Denny Hoskins rejected the referendum petition on Aug. 4, which was both the legal deadline and primary day. He argued that referendums cannot be used on congressional redistricting.
The justices noted that the Secretary knew before the primary that using the new map carried significant risks. "The Secretary nonetheless chose to proceed with the 2025 map for the primary," the Supreme Court's per curiam opinion said, Talking Points Memo reported.
Whiplash followed. On Sept. 3, the Missouri Supreme Court found the petition valid and ordered the 2022 districts used. On Sept. 8, Justice Brett Kavanaugh, acting alone, left that ruling in place; minutes later, U.S. District Judge Stephen Clark issued a conflicting order for the new map. On Sept. 10, the full Supreme Court blocked Clark's order, and Missouri's high court briefly held Hoskins in contempt for telling local election authorities to use the new lines.
Voters absorbed the cost. More than 1 million potential voters, nearly 1 in 4 statewide, had been shifted from one district to another, according to PBS News. At least 16 lawsuits over the redistricting landed in state and federal courts.
The Republican case, taken seriously
The map's defenders raised a genuine concern. Missouri officials said reverting to the old lines after a primary held on the new ones would be unconstitutional, because it would move people into different districts between the two rounds of voting and infringe their voting rights. They claimed hundreds of thousands of primary voters would be disenfranchised. Voting under the newer map, they argued, "better advances the public interest," CBS News reported.
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State officials also warned of a bind either way. "The honest truth is that — regardless of what this Court does — Missouri will not be able to run an orderly 2026 General Election," they wrote in a filing, according to CBS. Missouri election officials said going back to the 2025 map mid-vote would be practically impossible given the time and cost of reprinting ballots.
The awkwardness is real. Republican state Sen. Rick Brattin won a six-way primary under the new lines to face Democratic Rep. Emanuel Cleaver, who ran unopposed. Both remain the nominees even though the districts have changed. Brattin, Republican Rep. Bob Onder and two voters brought the federal lawsuit behind the 8th Circuit ruling. They argued that changing district lines between a primary and a general election violates the U.S. Constitution, the position the appeals panel adopted, PBS reported.
On the other side, the referendum group People Not Politicians, led by organiser Richard von Glahn, warned that ballots already cast could be thrown out. "This court's stays are not invitations for a lower court to repackage the same relief and try again," People Not Politicians organisers wrote, Courthouse News reported.
Friday's order turned on timing and the referendum, not on whether the map was fair. The districts had survived most legal challenges, including claims that a mid-decade redraw violates the state constitution and that the districts lacked compactness, PBS reported.
One front in Trump's redistricting push
Missouri lawmakers passed the map in September 2025 at the urging of President Donald Trump and Republican Gov. Mike Kehoe. It moved parts of Kansas City out of Cleaver's 5th District into Republican-held districts and stretched the rest of the 5th east into rural Republican territory. About 59% of potential voters in the redrawn district would have been new to it, according to an Associated Press estimate reported by PBS.
Trump urged Republican-led states to redraw mid-decade to help the party hold the House, CBS reported. About a dozen states tried to change their districts over the past year, and Missouri's fight was the longest and most complex, according to PBS.
Kehoe called the ruling disappointing and said the state will comply. Cleaver pointed to the petition drive: "Tonight, after more than 305,000 Missourians demanded a say, the Supreme Court has put this shameful and unlawful scheme to rest. Power to the people," he said, according to CBS News.
The map is shelved for 2026, not settled. In November, Missouri voters will decide whether it governs future elections.