A federal judge on Friday ordered the Justice Department to hand over to two outside groups a disputed list of California voters it claims may not be U.S. citizens.

The ruling is the latest in an expansive legal battle between the federal government and the state ahead of the fast-approaching midterm elections. Millions of people in California have already voted in the election that concludes Tuesday.

Washington D.C. Chief District Judge James E. Boasberg ordered the Trump administration to share the list with lawyers for the Coalition for Humane Immigrant Rights and the UCLA Voting Rights Project. They want the list so they can examine who is on the list and assess its impact on eligible voters. It will be the first time that a nongovernment organization will have the opportunity to evaluate the merits of the list of some 20,000 names. State officials say it is highly unreliable and likely includes many people who are U.S.…