Erin Burnett Outfront

Three impeachment witness transcripts just released; Mulvaney plans to file separate lawsuit over House subpoena, withdraws request to join Kupperman lawsuit; Key witness: Pentagon was concerned about legality of withholding aid in exchange for dirt on Bidens; New York Times: Giuliani associate's lawyer says Ukraine quid pro quo existed; Trump says he'll release transcript of first Zelensky call this week; Biden accuses Warren of "condescending" and "elitist attitude" after she slammed him for not supporting 'Medicare for All'; Biden rejects claims that his attacks on Warren were sexist: "That's not what I intended to do"; Former Massachusetts Governor Deval Patrick considering White House bid; Bloomberg to skip first four primary contests if he runs; Castro says Iowa and New Hampshire shouldn't be first to vote; Iowa voters react to Bloomberg's plan to skip state; Warren mocks billionaires over wealth tax: "They might have to pay two cents