Voting Rights and Democracy

Common Cause v. Donald Trump

In Common Cause v. Donald Trump, the district court for the District of Columbia considered, among other things, whether a Trump Administration policy excluding undocumented immigrants from the apportionment base violated the Constitution.

Case Summary

The Constitution imposes on the federal government the constitutional obligation to count all persons residing in the United States regardless of their citizenship status for the purpose of apportioning representatives to Congress.  Consistent with this constitutional mandate, every administration for the last 150 years has counted all immigrants in the apportionment base for the purpose of allocating congressional representatives.

On July 21, 2020, however, President Trump issued a memorandum announcing that the new policy of the United States government is to “exclude from the apportionment base aliens who are not in a lawful immigration status.”  This new rule blatantly violates the text and history of the Article I and the Fourteenth Amendment and is but one in a long list of attempts by the Trump Administration to disrupt and alienate immigrant communities across this country.

Nonprofit organizations, along with some cities and individuals, filed suit in the district court for the District of Columbia, challenging the constitutionality of the government’s new policy.  CAC filed a friend-of-the-court brief on behalf of Members of Congress in support of the plaintiffs.

Our brief argued that, in order to guarantee equal representation for equal numbers of people, the Constitution mandated a count of the nation’s total population as the standard for apportioning representatives to Congress.  The Constitution’s text explicitly requires an “actual Enumeration” of the people, imposing on the federal government the duty to count the “whole number of persons in each State.”  As both Founding and Fourteenth Amendment history make clear, the Constitution requires the federal government to count “the whole body of the people” for the purpose of apportioning representatives. It draws no distinction between citizens and non-citizens, but rather requires that the “whole immigrant population should be numbered with the people and counted as part of them.”

Under the Constitution, the President cannot exclude undocumented immigrants from the apportionment base simply because of their immigration status.  To allow such a practice would significantly harm immigrant communities in this country and violate the constitutional requirement to count all persons, citizens and non-citizens alike, for the purpose of apportioning representatives to Congress.

The district court for the District of Columbia granted the defendants’ motion to dismiss the case, concluding that the case was not ripe for review.  The Supreme Court subsequently addressed the legality of the President’s memo in a separate case.

Case Timeline

  • August 26, 2020

    CAC files amici curiae brief on behalf of Members of Congress

    D.D.C. Amici Curiae Br.
  • September 29, 2020

    The District Court for the District of Columbia hears oral argument

  • November 25, 2020

    The District Court grants the defendants’ motion to dismiss

More from Voting Rights and Democracy

Voting Rights and Democracy
February 2, 2026

Forgotten Framers: Black Conventions and the Second Founding

79 Stan. L. Rev. __ (forthcoming 2027)
By: David H. Gans
Voting Rights and Democracy
February 26, 2026

“Forgotten Framers: Black Conventions and the Second Founding”

Election Law Blog
David Gans of the Constitutional Accountability Center has posted his draft on SSRN, forthcoming in the Stanford...
Voting Rights and Democracy
U.S. Court of Appeals for the First Circuit

California v. Trump

In California v. Trump, the United States Court of Appeals for the First Circuit is considering whether President Trump’s executive order on voting is unlawful.
Voting Rights and Democracy
January 9, 2026

Supreme Court Gets New Warning in Pending Case

Newsweek
The Democratic National Committee has filed an amicus brief in the Supreme Court’s upcoming election law...
Voting Rights and Democracy
U.S. Supreme Court

Watson v. Republican National Committee

In Watson v. Republican National Committee, the Supreme Court is considering whether Mississippi may count absentee ballots that are postmarked by Election Day but received up to 5 business days later.
Voting Rights and Democracy
December 9, 2025

CAC Release: Major Campaign Finance Case Tests Court’s Willingness to Respect Congress’s Policy Judgments Aimed at Curbing Harmful Corruption

WASHINGTON, DC – Following oral argument at the Supreme Court this morning in National Republican...
By: Miriam Becker-Cohen, David H. Gans