On September 16, the federal government sued Oregon and Maine because those states have refused to submit an unredacted list of its registered voters to the U.S. Department of Justice. The federal government says it suspects Oregon and Maine are violating the National Voting Rights Act (NVRA) by not keeping its list of voters cleared of ineligible voters.
The Oregon case is USA v State of Oregon, 6:25cv-1666. Here is the Complaint.
The case is assigned to U.S. District Court Judge Mustafa T. Kasubhai, a Biden appointee.
The Maine case is USA v Bellows, 1:25cv-468. Here is the Complaint. It is assigned to Magistrate Karen Frink Wolf. Magistrates are not appointed by presidents.