Supreme Court ends Missouri redistricting chaos, clarifies Purcell principle

Key points

• The Supreme Court rejected the use of a 2025 congressional map in Missouri that would have shifted the state’s House delegation from a 6-2 Republican majority to 7-1, preserving the 2022 map that includes a Democratic-leaning district in Kansas City held by Rep. Emanuel Cleaver.
• The Court’s unsigned decision, issued on September 25, 2026, marked the third intervention this month and the first time the justices provided a written explanation, citing the 'Purcell principle' to avoid 'electoral chaos' during an ongoing election.
• The ruling clarified that the Purcell principle, which discourages last-minute changes to election rules, applies to state court rulings as well as federal court orders, rejecting arguments from Republican attorneys general that it should be limited to federal courts.
• The decision overturned a recent 8th Circuit Court of Appeals ruling that had ordered Missouri to use the 2025 map, which had defied two prior Supreme Court stays. The Court noted that the 8th Circuit’s actions were an 'error' given the previous orders.
• Missouri Governor Mike Kehoe stated the state would follow the Supreme Court’s order, while opponents of the map, including the group People Not Politicians Missouri, celebrated the decision as a victory against 'corrupt politicians' trying to force the map into effect.

Background

This dispute began in September 2026 when the Missouri Supreme Court ruled that a gerrymandered 2025 congressional map never took legal effect due to a referendum process. Republicans sought emergency stays from federal courts, leading to a series of conflicting rulings. The Supreme Court had previously blocked the map twice without explanation, prompting criticism of its 'shadow docket' practices. The 8th Circuit later revived the map, defying the Supreme Court’s pauses, before the final ruling settled the issue.

How outlets are covering it

Democracy Docket emphasizes the Court’s clarification of the Purcell principle and its application to state courts, noting that the decision ends a streak of partisan outcomes in redistricting cases. CNN focuses on the practical impact of the ruling, highlighting the preservation of the 2022 map and the reactions from Missouri officials, including Governor Kehoe’s disappointment and the celebration by map opponents. Both outlets agree that the ruling ends the immediate legal battle but differ in emphasis: Democracy Docket highlights the legal doctrine and shadow docket criticism, while CNN focuses on the political and electoral consequences.

Why it matters

The ruling sets a precedent for the application of the Purcell principle in future redistricting cases, clarifying that it applies to state court actions and not just federal ones. It also highlights the tensions between state and federal courts in election-related disputes and the need for clearer guidance from the Supreme Court to avoid confusion and chaos in the electoral process. The decision ensures that Missouri will use the 2022 map for the November 2026 midterms, preserving a Democratic-leaning district in Kansas City.

What to watch

The immediate legal battle over the Missouri congressional map is concluded, with the state set to use the 2022 map for the November 2026 midterms. However, questions remain about the scope and limits of the Purcell principle, particularly whether it applies to all federal courts, including the Supreme Court itself, and how far back the 'eve of an election' extends. The decision may influence future redistricting cases and the balance of power between state and federal courts in election-related disputes.