Paul Manafort

Paul Manafort's business partner Rick Gates has become the center of the defense's case. They say he is behind the financial crimes Manafort is accused of. Gates is expected to testify this week.

Paul Manafort, who was President Trump's campaign chairman, and a longtime deputy are named in a 12-count indictment. They pleaded not guilty. Manafort's attorney called the allegations "ridiculous."