The Missouri Supreme Court on Tuesday upheld the state’s new congressional district maps, a decision that solidifies Republican control over the state’s delegation in the U.S. House of Representatives and delivers a legal victory to GOP-backed redistricting efforts that have drawn nationwide scrutiny. The 4-3 ruling, with two Democratic-appointed justices joining the majority, marks the culmination of a contentious battle over political boundaries that has played out in courts across the country since the 2020 Census.
The maps, drawn by the Missouri legislature and signed into law by Republican Governor Mike Parson in December 2022, were immediately challenged by Democrats and voting rights groups who argued they violated the state constitution’s nonpartisan redistricting amendment approved by voters in 2018. That amendment, passed overwhelmingly, requires that congressional maps be drawn without regard to political party affiliation. Critics of the GOP-drafted plan contended it gerrymandered districts to maximize Republican seats while diluting Democratic representation in a state that has trended toward competitive elections in recent years.
In its ruling, the court rejected those arguments, stating that the legislature’s maps did not violate the nonpartisan requirement. The decision hinged on the court’s interpretation of the 2018 amendment, which it found did not prohibit partisan considerations in the drawing of districts. “The plain language of the amendment does not mandate a nonpartisan process,” Justice Laura D. Stith wrote in the majority opinion. “It prohibits the use of partisan data in the drawing of districts, but it does not require that the process itself be nonpartisan.” The dissenting justices, led by Chief Justice Zel Fischer, argued that the maps were an “unconstitutional gerrymander” that violated the spirit of the voter-approved amendment.
The maps are expected to secure at least six of Missouri’s eight congressional seats for Republicans, a gain that could shift the balance of power in the U.S. House. Under the new boundaries, districts such as the 5th—currently represented by Republican Emanuel Cleaver—have been redrawn to favor Republican candidates, while Democratic strongholds like St. Louis have been split to dilute voting strength. The changes come as Missouri, once a reliably Democratic state, has shifted toward the GOP in recent elections, including Parson’s 2020 victory over Democratic nominee Jason Kander by nearly 15 points.
The court’s decision also sets a precedent for other states grappling with redistricting disputes. Legal challenges to GOP-drawn maps in Ohio, North Carolina, and Florida remain pending, and the Missouri ruling could embolden similar arguments in those cases. Meanwhile, Democratic-led states such as California and New York, which have implemented independent redistricting commissions, are likely to cite the Missouri decision as evidence of the dangers of partisan map-drawing.
Reaction to the ruling was immediate. Missouri’s Republican Party hailed the decision as a vindication of the legislative process, with state GOP Chair Ken Allred calling it “a win for Missouri voters and a reaffirmation of the will of the people.” Democratic leaders, including U.S. Representative Cori Bush, condemned the maps as an affront to democratic principles. “This isn’t just about Missouri—it’s about whether we believe in fair representation or political gamesmanship,” Bush said in a statement. “The people of Missouri deserve better than gerrymandered districts that lock in one-party rule.”
The case now shifts to the federal courts, where Democratic lawmakers and voting rights organizations have vowed to appeal. A federal lawsuit challenging the Missouri maps on grounds of racial gerrymandering—filed by the NAACP and other groups—remains active in the U.S. District Court for the Eastern District of Missouri. The outcome of that case could further complicate the state’s redistricting landscape, particularly in districts where minority voting strength has been diluted.
With the primary election season underway, the maps will be tested in the November 2024 elections, when Missouri’s congressional delegation will be up for reelection. The state’s shift toward a more Republican-leaning electorate, combined with the court’s ruling, ensures that the GOP will maintain a dominant position in the House delegation for the foreseeable future—unless further legal challenges succeed in altering the boundaries before voters go to the polls.
