Gordon Sondland implicated Trump and other top administration officials refusing to testify in the plot to bribe Ukraine as Democrats weigh the next steps in the impeachment inquiry. Laurence Tribe tells Lawrence O’Donnell that Democrats should not delay the inquiry while they fight witness subpoenas because Trump's stonewalling can be used as obstruction: "The evidence is all there and there's nothing left to do but collate it into articles of impeachment."