What Was Going On In Giuliani's War Room On Jan. 5?

We look ahead to today's January 6th hearing, which will explore whether Trump allies were coordinating with extremist groups ahead of the insurrection. On Today's Show: Roger Parloff , journalist and senior editor at Lawfare, previews Tuesday's January 6 hearing, which will focus on the connection between former President Trump and extremist groups involved in storming the Capitol, like the Proud Boys and the Oath Keepers.