The U.S. Department of Justice sued California on Thursday, Oct. 15, demanding the state address a federal list of 20,000 people alleged to be noncitizens who may be registered to vote. The department had given California election officials just two days to review the names before filing suit. The case lands less than three weeks before the midterm elections and marks the latest federal effort to press states over how they maintain voter rolls. The allegations concern possible registrations; the information provided does not establish that the people on the list are noncitizens or that any cast ballots unlawfully. The dispute puts renewed attention on the accuracy of voter registration records and the balance of authority between federal officials and states that administer elections.