Who Counts? Missouri’s Lawsuit Puts the Future of American Representation on Trial

On January 30, 2026, Missouri Attorney General Catherine Hanaway filed a federal lawsuit against the U.S. Department of Commerce and the U.S. Census Bureau, challenging how the federal government counts population for congressional apportionment. The case, filed in the U.S. District Court for the Eastern District of Missouri, seeks to stop the inclusion of undocumented immigrants and certain non-citizens in both the decennial census and the allocation of seats in the U.S. House of Representatives. 

This lawsuit is notable for its bold legal theory and the broad constitutional questions it raises about representation, federal authority, and the interpretation of the Constitution’s apportionment clauses. In a deeply divided political environment, debates over census methodology have taken on heightened significance, with implications extending far beyond Missouri’s borders.

The Core Legal Argument

At its heart, the lawsuit argues that the U.S. Constitution and the Fourteenth Amendment — specifically Article I, Section 2 and Section 2 of the Fourteenth Amendment — require representative apportionment to be based only on citizens and lawful residents, not undocumented immigrants or temporary visa holders. In the complaint, published by the Attorney General’s office, Missouri asserts that counting those without legal status dilutes the political power of citizens in states like Missouri and diverts federal funding, which is distributed based on census figures. 

This theory hinges on an originalist reading of the Constitution: the lawsuit claims that the framers did not intend to count undocumented immigrants for congressional apportionment. According to the filing, the practice of including all persons regardless of status — which the census has done since the 1980 Census under guidance from the Department of Commerce — is both unlawful and unconstitutional. 

Missouri asks the court to:

Declare that including undocumented immigrants and temporary visa holders in apportionment counts violates both the Constitution and the Administrative Procedure Act; Order a recount of the 2020 Census excluding those populations; and Prevent the Census Bureau from counting these groups in the 2030 Census. 

Why This Matters Politically and Legally

Representation and Political Power

The census determines how the 435 seats in the U.S. House of Representatives are divided among the states. It also drives the allocation of electoral votes in presidential elections and influences hundreds of federal programs that direct funding based on population levels. Therefore, even minor changes in population counts can shift political power and resources across states.

Missouri’s complaint contends that states with larger undocumented immigrant populations — often Democratic-leaning states such as California and New York — gain an unfair advantage, while states like Missouri lose seats and corresponding federal funds. 

Legal scholars note that this argument taps into longstanding debates about representation and who counts as part of “the people” under the Constitution. Historically, the census has counted all persons residing in the United States — citizens and non-citizens alike — under the simple constitutional directive that apportionment be based on the “whole number of persons.” Opponents of Missouri’s theory argue that excluding individuals from population counts based on immigration status would be a drastic departure from more than two centuries of practice. 

How the Federal Government and Courts May Respond

The federal government typically defends its census practices by pointing to the plain text of the Constitution, which does not explicitly tie apportionment to citizenship or lawful residence. Instead, the Constitution speaks broadly of counting every person. Courts have historically deferred to census practice and interpretation unless there is a clear violation of law or constitutional text.

In previous census-related litigation, courts have been reluctant to entertain novel constitutional interpretations that would upend longstanding administrative practice unless there are clear precedents or statutory violations. Whether this new Missouri lawsuit will clear those hurdles remains uncertain.

Moreover, the Supreme Court and lower federal courts have repeatedly confronted disputes over standing — whether a state or party has the right to bring a lawsuit. A notable recent case, Murthy v. Missouri, involved a First Amendment challenge by Missouri and Louisiana against federal interactions with social media companies; that case ended with the Supreme Court finding the plaintiffs lacked standing. 

Political Context and Broader Legal Strategy

Attorney General Hanaway argued in her press release that the lawsuit defends the constitutional right to fair representation and protects Missouri citizens against what she describes as “an ongoing denial of their right to self-government.” 

While critics frame this lawsuit as a politically charged effort that reflects broader debates over immigration and federal power, legal defenders emphasize its constitutional argument rather than partisan motives. Regardless, the case situates Missouri in a broader conservative legal strategy that seeks to reinterpret foundational constitutional clauses with significant political consequences.

Missouri’s lawsuit also arrives amid other high-profile legal controversies involving the state’s attorney general and federal law. For example, earlier disputes included efforts to challenge voter referendum processes and congressional redistricting maps, as well as assertions about racial gerrymandering in St. Louis. 

What’s Next

The lawsuit will play out in the federal district court, but it is likely — given its constitutional focus and the reach of its claims — that either party may seek review by the U.S. Supreme Court if the lower courts reject key arguments.

Legal analysts will be watching not only the constitutional theories at stake but also how courts treat the question of standing and the practical implications for future censuses. If successful, Missouri’s case could reshape how the census is conducted and how representation is calculated nationwide — a change with profound implications for federal politics, demographics, and the apportionment of power among states.