Erin Burnett Outfront

Trump tells GOP to "get tough and fight" impeachment; CNN: Key impeachment witness set to testify tomorrow initially hesitant to take Ukraine role; Republicans tried, failed to force censure vote on Schiff; Trump defends Tulsi Gabbard after Hillary Clinton claims Russians are "grooming" her; Sources: Trump increasingly frustrated with Mulvaney on what he views as inability to communicate on impeachment; Trump rails against impeachment probe as sources say he is growing frustrated with Mulvaney over his defense; Cornyn:"I wish the chief of staff wasn't holding press conferences" and asks why press secretary isn't; Trump falsely claims Ukraine whistleblower has been discredited, questions why protection is needed; Trump on ISIS: "I'm the one that did the capturing"; Trump mocks constitution, calls emoluments clause "phony"After attacks from rivals, Warren vows to release plan detailing how she'll pay for Medicare for All; Klobuchar attacks Wa