(CNN)Sen. Bob Corker and Sen. Ben Cardin on Congress' response to a final Iran nuclear deal.
Former Sen. Jim Webb discusses whether he'll challenge Hillary Clinton for Democratic presidential nomination.
CNN's Sara Murray and Peter Baker of the New York Times on the week that was in the 2016 presidential race.
Plus, Ali Rezaian speaks about the imprisonment of his brother, American journalist Jason Rezaian, in Iran.
Jim Sciutto hosts State of the Union on Sunday at 9am and Noon ET on CNN.