A federal judge has ruled against the Trump administration in its efforts to obtain voter data in Arizona. 

Judge Susan Brnovich of the U.S. District Court for the District of Arizona ruled Tuesday that the state's voter registration list isn't subject to requests from the U.S. attorney general under federal law, NBC News reported. 

Brnovich, a Trump appointee, dismissed the case with prejudice because an amended complaint, she said, would be "legally futile." 

The dismissal is just one of many other similar rulings against the Justice Department, which has sued at least 30 states and the District of Columbia seeking to obtain dates of birth, addresses, driver's license numbers and partial Social Security numbers of voters.