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On December 11, 2025, the United States sued New Mexico Secretary of State Maggie Toulouse Oliver, seeking the release of the state's unredacted voter file, which includes voters' full names, dates of birth, residential addresses, driver's license numbers, and the last four digits of voters' Social Security numbers. The United States claims—without merit—that this disclosure is compelled by the Civil Rights Act of 1960, a law passed to ensure Black voters in the Jim Crow South were able to register to vote.

This lawsuit is one of several such cases that DOJ has brought recently against states, and it appears to be part of the federal government's broader efforts to create a national voter database without congressional authorization, to undermine the validity of certain states’ election administration process and voter rolls, and to question the status of certain voters. Shortly after DOJ filed its suit in New Mexico, we filed a motion to intervene and an accompanying motion to dismiss on behalf of Common Cause, its members, and two registered New Mexico voters whose personal data are at stake. On December 19, 2025, the court granted our motion to intervene in the lawsuit. The intervenors are represented by the ACLU Voting Rights Project and the ACLU of New Mexico.