Dem Rep. Green: Roberts 'Has to Step up' in Senate Trial, 'Can't Be a Fly on the Wall'

On Monday's broadcast of MSNBC's "All In," Representative Al Green (D-TX) said that in the Senate's impeachment trial, Supreme Court Chief Justice John Roberts "has to step up. He can't be a fly on the wall. He's got to be a person who lives up to what is expected of a presiding judge."