Sunday, January 5, 2020: A Defining Moment in the Trump Presidency

A defining moment of the Trump Presidency - Iran's top general killed in a U.S. airstrike. With Iran now vowing revenge, what happens next as tensions escalate in the Mideast? Plus, less than a month until Iowa votes. Will foreign policy now take center stage in the 2020 race? And an impeachment impasse. As Congress returns from the holidays, there's still no date for President Trump's trial. Nia-Malika Henderson in the anchor chair. Today's panel: Margaret Talev of Axios, Politico's Heather Caygle, CNN's Abby Phillip, and the Washington Post's Josh Dawsey and Dan Lamothe. Plus exclusive reporting on the ground in Tehran from CNN's Fred Pleitgen.

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