IE 11 is not supported. For an optimal experience visit our site on another browser.

What ISIS means for the US and Syria

06:31

If defeating ISIS in Iraq also means defeating them in Syria, what does that mean for U.S. military policy in the Middle East? Steve Kornacki talks with Rep. Barbara Lee, D-Calif., the only member of Congress to vote against the Authorization for Use of Military Force in the wake of 9/11.