The government says in a court filing Friday that a judge should throw out that suit.
Justice Department lawyers say federal courts are prohibited from interfering with ongoing criminal prosecutions — and that Mueller’s been operating properly and not exceeded his authority.
The department says if Manafort believes he’s being unfairly prosecuted, then he can file a motion in his criminal case to seek to have it dismissed.
Manafort is one of four people charged so far in Mueller’s investigation.