Defense lawyers had asked Ellis to sentence Manafort to between 4-1/4 and 5-1/4 years in prison, writing in their sentencing memo that Mueller's "attempt to vilify Mr. Manafort as a lifelong and irredeemable felon is beyond the pale and grossly overstates the facts before this court."

Ellis had faced criticism by some in the legal community for comments he made during the trial that were widely interpreted as biased against the prosecution.

Ellis repeatedly interrupted prosecutors, told them to stop using the word "oligarch" to describe people associated with Manafort because it made him seem "despicable," and objected to pictures of Manafort's luxury items they planned to show jurors.

"It isn't a crime to have a lot of money and be profligate in your spending," Ellis told prosecutors during the trial.