The U.S. Department of Justice intervened in the midterm elections, and courts dismissed lawsuits against California and Alaska.

The Justice Department, under President Trump, intervened in the midterm elections through lawsuits and criminal investigations before the election results were certified. The Justice Department requested a California court to exclude mail-in ballots from approximately 20,000 voters and to provide records to cooperate with the criminal investigation. The court has since dismissed the Justice Department's lawsuits against California and Alaska, and the Justice Department has appealed the ruling in the Alaska case.