Anderson Cooper 360

House Democrats wrap up day two of making their case; lay out abuse of power against President Trump; House Manager: Trumps conduct: "Puts even President Nixon to shame;" GOP Senator Blackburn questions patriotism of National Security Security Council aide and Purple Heart recipient who testified in House impeachment probe; Trump Lawyer: Dems case today "opened the door" for them to discuss Joe Biden, Ukraine energy company; Dems seek four GOP votes to subpoena additional witnesses, docs via Knit