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Three weeks before the midterm elections, the U.S. Department of Justice sued the state of California on October 15, demanding that election officials stop counting mail ballots from more than 20,000 registered voters the federal government says are 'likely' noncitizens.
The word 'likely' is doing enormous work in that sentence. The list was compiled by Homeland Security Investigations and federal partners, who analyzed publicly available voter-registration records and compared them with federal immigration data. According to California Secretary of State Shirley Weber, whose office is named in the suit, DHS has repeatedly refused to explain its data or methodology in writing. What state officials did receive, according to The Hill, was a USB drive with a handwritten password, delivered on a Tuesday with a demand that the state cross-reference the names within 48 hours or face legal action. Los Angeles County Registrar Dean Logan said his office declined to even plug in the drive, citing data privacy and information security protocols.
When California did not comply, the Justice Department sued. The complaint asks a federal court to order the state to set aside vote-by-mail ballots from people on the list and verify their citizenship beyond the sworn statements required at registration, before their votes are tabulated.
Here is where the administration's own track record becomes relevant. In July, DHS accused California of having as many as 190,000 noncitizen voters on its rolls. A preliminary review then trimmed that to 81,000 potential registrants. Now the number stands at roughly 20,000. The same pattern played out in Nevada: DHS accused that state of harboring as many as 16,000 noncitizen registrants, its own review cut the figure to 185, and when Nevada examined those 185 names, every single one turned out to be a U.S. citizen, according to reporting cited by The Hill. That is a 100 percent error rate on the final list.
This is the core tension in the story. Noncitizen voting in federal elections is illegal, and the government has every right to investigate genuine cases. But the methodology being used here, matching names across databases that were never designed to establish citizenship, has a documented tendency to sweep up naturalized citizens, people with common surnames, and voters whose records simply lag behind their naturalization. The Nevada outcome suggests the false-positive problem is not theoretical.
Weber has also raised a procedural objection that cuts to the heart of the timing. She says state law prohibits voter cancellations after August 5, and Governor Gavin Newsom argued the federal demand asks California officials to violate the law. Election officials have established procedures for removing voters, and those procedures exist precisely to prevent last-minute purges based on unverified information. Weber called the situation 'an emergency of the DOJ's creation.'
The administration frames all of this as protecting citizen votes from dilution. 'Even one noncitizen vote cancels out the ballot of an American citizen,' said DHS Secretary Markwayne Mullin. First Assistant U.S. Attorney Bill Essayli said California officials 'refused' to remove noncitizens and sequester ballots. That framing assumes the list is accurate. The evidence from Nevada, and the shrinking California numbers, suggests skepticism is warranted.
There is also a quieter legal fight happening underneath this one. The UCLA Voting Rights Project sued DHS and DOJ in September seeking information about how the government built its list of alleged noncitizen voters, and has sought an emergency order blocking the Justice Department from pushing California to cross-reference voters. In other words, the methodology at the center of this week's lawsuit is itself under legal challenge, and the government has so far declined to put it in writing even for state officials asking for an accurate record.
What happens next matters beyond California. If a court blesses this approach, a federal agency could generate a list, deliver it days before an election, and effectively freeze ballots in any state that mails ballots to every registered voter. If the court rejects it, the episode still normalizes the idea that thousands of voters can be publicly branded as suspected noncitizens on the strength of data the government will not show anyone. Either way, the people most exposed are naturalized citizens, the voters whose names are most likely to produce false matches and who have the most to lose from a mistaken flag on their record.
Free Game Takeaway
If you are a naturalized citizen voting by mail, especially in a state the federal government is pressuring over its voter rolls, this is the election to vote early, keep your naturalization documents accessible, and verify your registration status and ballot tracking through your county elections office rather than assuming everything is fine. Watch two things in the coming weeks: whether the court forces California to sequester ballots, and whether DHS ever discloses its matching methodology, which the UCLA Voting Rights Project is suing to obtain. The Nevada precedent is the tell. When that state's list was actually checked, the government's 16,000 alleged noncitizens became 185 names, and all 185 were citizens. Treat any headline number of 'illegal voters' as a claim awaiting verification, because the verification stage is exactly where these lists have been collapsing.