Trump: Only "legitimate" whistleblowers should be protected; Trump falsely claims whistleblower is "dishonest" & "inaccurate"; Now: State Dept Inspector General holding "urgent" briefing on Capitol Hill over Ukraine; House Democrats: Stonewalling by Trump Administration may be considered obstruction; Lineup announced for CNN/NYT Dem Presidential Debate; Trump froze Ukraine aid in June, demanded a policy review that baffled officials;