Erin Burnett Outfront

White House subpoenaed by House Democrats, say President's actions left them "no choice"; Pompeo, Giuliani face subpoena deadline tonight; Romney, Hurd slam Trump for asking China to investigate Biden; Doctors: Bernie Sanders suffered a heart attack; 2020 candidate released from hospital earlier today; Biden defends son: "No indication of any conflict of interest from Ukraine or anywhere else. Period"; Trump's children make international deals while the President accuses Biden of being "corrupt" because his son did same thing; Caught in the middle of a Trump tirade via Knit