Schiff: Republicans' call for Hunter Biden testimony is "abuse" of impeachment trial

Four of the seven House impeachment managers for President Trump's Senate trial spoke with "CBS Evening News" anchor Norah O'Donnell about their case for the president's removal and why they disagree with his argument that abuse of power is not a crime. House Intelligence Committee Chairman Adam Schiff said Republicans' push for Hunter Biden to testify would be an "abuse" of the trial.