Missouri’s new congressional map remains part of primary-day uncertainty
Missouri is holding its congressional primary under a new congressional map while the legal and electoral future of that map remains unsettled.
Local election authorities are administering the August 4, 2026, primary under House Bill 1’s Missouri First map. The Secretary of State’s Office said the map remains in effect after Missouri Supreme Court rulings held that submitting referendum petitions did not automatically suspend the law.
At the same time, Referendum Petition 2026-R004 remains listed on the Secretary of State’s official preliminary reports page as current as of July 31. August 4 is the deadline for the Secretary of State to determine whether the petition is valid. The official page reviewed for this article did not show a final certification or rejection.
What voters are using today
House Bill 1 redrew Missouri’s eight congressional districts during a special legislative session. The new map divides portions of Kansas City among three districts and changes the boundaries of the 5th Congressional District, represented by Democrat Emanuel Cleaver.
In a May 14 guidance statement, Secretary of State Denny Hoskins said local election authorities should continue candidate filing, ballot programming and precinct assignments under the districts established by House Bill 1. That is the map being used for the August primary.
Missouri’s official election calendar lists August 4, 2026, as the primary election and November 3, 2026, as the general election.
What remains unresolved
Referendum Petition 2026-R004 seeks to put the redistricting law before voters. The Secretary of State’s preliminary petition page identifies the petition as current as of July 31 and warns that the verification data is preliminary and reflects the review stage at the time of posting.
The Secretary of State’s determination deadline falls on August 4, the same day as the primary. The preliminary page, by itself, does not establish whether the petition ultimately will be certified or rejected.
The Associated Press reported that the petition appeared on track to receive enough valid signatures based on progress reports from local election authorities, while also reporting that Hoskins had questioned whether a referendum could legally be used for congressional redistricting.
Why the map was not suspended
Submitting referendum signatures did not automatically suspend House Bill 1. The Secretary of State said the Missouri Supreme Court’s May rulings affirmed the law and clarified that filing referendum petitions alone did not stop it from taking effect.
That creates an important distinction for voters: the referendum review and the map’s current operational status are separate questions. Filing a petition began the verification process, but it did not replace the district boundaries election officials were instructed to use for the primary.
What certification could change
If the Secretary of State certifies Referendum Petition 2026-R004, the map could go before voters at the November 3 general election. Axios reported that certification would suspend the map pending the vote and that the Missouri Supreme Court had indicated the map could then be treated as though it never took effect.
That would not, by itself, establish exactly how the November congressional election would proceed. Courts and election officials could still have to address which district boundaries govern, whether any election procedures must change and how candidates nominated under the August map would be treated.
If the petition is rejected, the map would remain in place unless subsequent court action changes its status. Challenges to the redistricting law and appeals are separate from the Secretary of State’s petition review.
Kansas City faces the clearest change
Kansas City voters are among those most directly affected. The new map splits portions of the city among three congressional districts and changes the boundaries of the 5th District, according to Associated Press and Axios reporting.
Those changes determine which congressional candidates appear on primary ballots, which voters are grouped together and which residents would be represented by a winning candidate in November if the map remains in effect.
What to watch next
The immediate item to watch is the Secretary of State’s final action on Referendum Petition 2026-R004. Residents should also watch for updated election guidance, court filings and decisions addressing the map’s status after the primary.
For now, the operational answer is clear: Missouri’s August 4 congressional primary is being conducted under House Bill 1’s Missouri First map. The boundaries that will govern the November 3 general election, and the status of candidates nominated under the August map, remain unresolved questions unless and until the petition process and related court proceedings produce further decisions.
Sources
- Missouri Secretary of State preliminary petition reports
- Associated Press report on Missouri congressional districts
- Axios Kansas City report on Missouri’s map fight
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