What was the strategy behind the President's Iran tweet?07:05
Last night, Donald Trump tweeted a strongly worded message to President Rouhani of Iran. Jim Walsh, a research associate at MIT's Security Studies Program tells Katy Tur that the President's tweet could come off as a nuclear threat.
Rep. Himes: 'Very unlikely that Republicans would sign up for impeachment proceedings'07:16
Pres. Historian: 'I don’t see the argument' against impeachment07:38
Big Question: How can Republicans justify NOT voting to impeach the President?02:08
Meacham: Country at an inflection point03:24
Do Iowa voters still support Steve King?02:54
Dem. Rep reacts to President Trump's letter to Speaker Pelosi08:42