Supreme Court Revives SAVE Voter Citizenship Checks

The U.S. Supreme Court on Friday revived a controversial federal data system that the Department of Homeland Security has repurposed into a tool for checking the citizenship of millions of Americans on state voter rolls, handing the Trump administration a temporary but significant win just weeks before the November midterm elections.

The 6-3 order, issued in the name of the court by Chief Justice John Roberts, stayed a lower-court injunction that had blocked the expanded version of the Systematic Alien Verification for Entitlements (SAVE) database since June. The three liberal justices dissented, with Justice Ketanji Brown Jackson authoring the dissent. The ruling sends the case back to the U.S. Court of Appeals for the D.C. Circuit for further review.

What the Court Decided

The SAVE system is a 40-year-old federal database originally created to verify the immigration status of noncitizens applying for public benefits. DHS overhauled it in 2025, linking it to Social Security Administration records, enabling bulk searches, and encouraging states to upload entire voter rolls.

According to NPR, many states shared their voter lists with the expanded system, running tens of millions of records through SAVE before a federal judge blocked it in June. The Supreme Court’s order clears the way for the administration to again use the revamped tool — both to search for noncitizens on voter rolls and to pursue its broader project of compiling citizenship lists for each state.

The conservative majority found that the government was likely to prevail on the merits, pointing to a provision of the 1996 Illegal Immigration Reform and Immigrant Responsibility Act that it said authorizes DHS to disclose citizenship information, including Social Security data, to states.

“The District Court’s order thus inhibits the Federal Government’s efforts to assist state and local agencies in the proper administration of the midterm elections,” the majority wrote, adding that “under these circumstances, the equities weigh in favor of a stay.”

The Dissent and the Lower-Court Record

In a forceful dissent, Jackson accused the majority of ignoring the demonstrated harms of the program. “The harm caused by burdening or disenfranchising even a few lawful voters outweighs the nonexistent harm that the government experiences when it is prevented from taking an action that it likely lacks the authority to take,” she wrote, as reported by CNBC.

Jackson noted that the district court had “highlighted such harms, noting the risk that States might cancel the voter registrations of at least some recently naturalized citizens or force such persons to provide proof of citizenship before voting.” She also observed that in the three decades since the 1996 law was enacted, “the government has never invoked [the provision] in that way — even as it has repeatedly refined the SAVE program.”

The dispute traces back to a June ruling by U.S. District Judge Sparkle Sooknanan, a Biden appointee, who blocked the modified SAVE after finding that its aggregation and disclosure of sensitive data violated the Social Security Act, the Privacy Act, and the Administrative Procedure Act. “All in all, the federal government has knowingly trampled on the privacy rights of American citizens in a manner that threatens the sacred right to vote,” she wrote. “This court cannot stand idly by while that happens.”

The D.C. Circuit declined to stay her ruling in a 2-1 vote on September 4, prompting Solicitor General D. John Sauer to appeal to the Supreme Court. In his filing, Sauer wrote that since May 2025 the updated SAVE had verified more than 65 million voters across 26 states and flagged 28,635 as potential noncitizens, arguing that the district court’s order “makes it harder to detect ineligible voters.”

A Record of False Positives

The case against the program rests heavily on evidence that SAVE repeatedly flags eligible citizens. As The Guardian reported, the League of Women Voters and the Electronic Privacy Information Center sued last year, arguing the system was riddled with inaccuracies and violated federal privacy law.

That concern has been borne out in practice. As Mother Jones detailed, Missouri’s St. Louis County initially saw 691 voters flagged by SAVE as noncitizens; after the list was cross-referenced with more accurate passport data, it fell to 133 — meaning at least 81 percent of the initial results were incorrect. In Texas, Denton County’s elections administrator told ProPublica that he suspected his own voter rolls were more accurate than the database.

The Brennan Center for Justice has warned that even a modest error rate in a dataset this large inevitably produces thousands of false matches, and that no data source feeding SAVE reliably captures the most current information on newly naturalized citizens. The Texas Secretary of State reported that after running its full list of 18 million voters through SAVE, the system flagged 2,724 as potential noncitizens — but 578 later demonstrated citizenship, and only 117 cases, or 4.2 percent, were referred for investigation.

The 90-Day Window

The immediate practical impact may be limited. Federal law bars states from systematically removing voters from the rolls within 90 days of a federal election. The court’s majority said that while the injunction had blocked the use of the modified SAVE for individualized inquiries, such inquiries are permitted under federal law during that window.

In her dissent, Jackson acknowledged as much. It is “too late for States to use SAVE for systematic voter-list maintenance in advance of the 2026 elections,” she wrote, adding that the ruling “will likely have minimal short-term impact, as States will at most conduct individualized voter-roll maintenance using the modified SAVE system ahead of the November elections.”

Still, voting-rights groups warned that even individualized checks carry risk. “Today’s decision is profoundly disappointing, as it puts millions of Americans at risk of being unlawfully targeted by the administration’s unreliable voter purge database weeks before the midterm elections,” the League of Women Voters said in a statement, adding that the litigation is ongoing.

The ruling lands amid a broader federal push on elections. A March executive order directs agencies to consult SAVE and other records to build state-by-state citizenship lists, a project that is itself under legal challenge. On the same day as the Supreme Court order, a federal judge in Maryland told the government it must give 30 days’ notice before launching a portal to publish such lists.

What’s Next

The case now returns to the D.C. Circuit, where the administration will seek a durable ruling in its favor while the district court litigation continues. The Supreme Court’s action is a stay, not a final judgment, meaning the underlying legal questions about privacy, the Social Security Act, and the limits of federal authority over elections remain unresolved.

With Election Day set for November 3, the practical question is how aggressively the administration uses the revived system in the weeks ahead — and whether any eligible citizens are wrongly flagged in the process. As Jackson warned, the burden of proving citizenship, even for a few lawful voters, is a cost the majority chose not to weigh.