On October 15, the U.S. government filed a lawsuit in U.S. District Court in Los Angeles, alleging that it has a list of 20,000 registered California voters whom it believes are not citizens. The federal government seeks a court order to impound ballots from any of these individuals who cast a ballot. These ballots would then be set aside and not counted until further investigation shows that they the voters who cast them are eligible. USA v State of California, c.d., 2:26cv-12025.
The case still does not have a judge. Here is the federal government’s October 19 brief.