As the first week of Pres. Trump’s Senate trial wraps up, four Democratic senators who served during the Bill Clinton trial for an exclusive joint interview with MSNBC Chief Legal Correspondent Ari Melber. All four say that abuse of power is an impeachable offense and a separate felony is not required for impeachment – fact-checking recent claims by Pres. Trump’s allies – while they differed on aspects of the Democratic House Managers’ arguments on obstruction of Congress. The four former Senators are Russ Feingold, Robert Torricelli, John Breaux and Byron Dorgan, who added that any president “has a responsibility to respond to the Congress, to provide those documents and those witnesses” requested in the Ukraine and impeachment investigations.