Judge blocks use of federal database to check citizenship, saying it could wrongly purge voters

The decision is a major legal setback for President Donald Trump in his efforts to use federal agencies to encourage a nationwide crackdown on noncitizens illegally on state voter rolls. The modified SAVE system, which critics had referred to as an unlawful centralized federal database of voter information, had been a key pillar of the second election executive order the Republican president signed earlier this year. The ruling leaves its future uncertain.

“It’s amazing how hard the Left will fight to stop us from solving problems they insist do not exist,” James Percival, general counsel at the Department of Homeland Security, said of the ruling in a social media post.

The department referred to his post as its comment on the ruling. The Department of Justice did not immediately return a request for comment.

The SAVE program was created under an immigration law mandating that DHS help federal, state and local agencies prevent government benefits from going to noncitizens. At least 25 states used it to check their voter rolls since April 2025, after the Trump administration significantly expanded its search abilities. Since then, at least 67 million registrations have been scanned through the program, but critics worry it could end up purging valid voters from the rolls.

The plaintiffs, including the League of Women Voters, the Electronic Privacy Information Center and five unnamed U.S. citizens, had alleged the revamped SAVE program violated Americans’ privacy and voting rights. The groups also alleged the Trump administration violated federal privacy laws by ignoring transparency requirements about the changes to the system.

“The agencies were scrambling to comply with an Executive Order aimed at reshaping federal elections, which directed them to create a system for mass voter verification,” the judge wrote. “So they haphazardly combined and repurposed the private information of millions of Americans, including citizenship data that they knew to be unreliable.”

Plaintiffs attorney Nikhel Sus told the court during the October hearing that naturalized citizens face a greater risk of unlawfully being purged from voter rolls.

“They are uniquely vulnerable to errors in the database,” said Sus, an attorney for Citizens for Responsibility and Ethics in Washington.

Sus said Monday he sees Sooknanan’s ruling as an “across the board victory” and noted the plaintiffs were pleased the judge’s ruling reinforced their argument that the federal government doesn’t have implied authority to freely share sensitive data across agencies.

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Swenson reported from New York.

Ali Swenson And Fatima Hussein, The Associated Press

by The Canadian Press

Judge blocks use of federal database to check citizenship, saying it could wrongly purge voters

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