Anderson Cooper 360

House Democrats subpoena White House for Ukraine documents as part of impeachment inquiry; White House subpoenaed by House Democrats; Pompeo, Giuliani face subpoena deadline tonight; White House "This subpoena changes nothing just more document requests, wasted time;" Democratic Chairmen: Pres. Trump's "actions have left us no choice but to issue this subpoena;" House Democrats demand documents from Pence in impeachment inquiry; Biden: Trump has indicted himself; NY Times: Second intelligence official is weighing whether to file a formal whistleblower complaint via Knit