The Situation Room With Wolf Blitzer

Impeachment witness Lieutenant Colonel Vindman fired from White House; Attorney: Vindman fired for "Telling the Truth"; Impeachment witness Bill Taylor says Lieutenant Colonel Vindman, Ambassador Yovanovitch have been "Unfairly Attacked"; Photos of Giuliani in Spain suggest Lev Parnas has more material to share with investigators; Iowa Democratic Chair: Caucus mistakes "Categorically Unacceptable"; Iowa Democratic Chair admits he didn't use failed app at the center of caucus counting controversy; Sanders: Won't ask for full recanvas of Iowa results; Deadline extended for candidates to challenge Iowa results; Sanders hits Buttigieg over wealthy donors; Trump mocks Democrats over Iowa counting troubles; Trump: Democrats "Fried" their votes in Iowa; Trump's Big Week: Acquittal, Poll Numbers, Jobs Report; Some Sanders fans use hostile tactics to drown out critics; Coronavirus infections spur cruise ship quarantines amid growing global concerns over spreading