The Justice Department filed lawsuits on Thursday against six states — California, Michigan, Minnesota, New York, New Hampshire, and Pennsylvania — for refusing to hand over their statewide voter registration lists, escalating the Trump administration’s campaign to enforce federal election integrity laws.

The complaints were filed in several federal courts on Thursday, citing the states’ alleged violations of the National Voter Registration Act of 1993, the Help America Vote Act of 2002, and the Civil Rights Act of 1960. The suits target senior election officials in each state and seek court orders to compel full disclosure of voter data, including names, birth dates, driver’s license numbers, and partial Social Security numbers.