Anderson Cooper 360

Exclusive: What Warren-Sanders Said In Tense Moment After Debate; House Managers Deliver Impeachment Articles To Senate; New Evidence Fuels Debate Over Impeachment Witnesses; Indicted Rudy Giuliani Associate At Center Of Ukraine Scandal: "Trump Knew Exactly What Was Going On"; House Managers Deliver Impeachment Articles To Senate As New Documents Shed Light On Giuliani's Shadow Efforts In Ukraine; Exclusive: Warren Said To Sanders "I Think You Called Me A Liar On National TV" After Debate; Exclusive: Sanders Responded To Warren With "Let's Not Do It Right Now"; Hyde Says Texts With Giuliani Associate Taken Too Seriously, Denies He Surveilled Amb. Yovanovitch via Knit