This Week: In Blow To Trump, Mueller Finally Gets Manafort To Flip

After months of insisting on his innocence, former Trump campaign chairman Paul Manafort finally flipped, agreeing in a plea deal announced Friday to cooperate with Special Counsel Robert Mueller. In a D.C. federal courtroom, Manafort pleaded guilty to one count of conspiracy against the United States and one count of obstruction of justice through witness tampering.