Iraq in turmoil again, House Republican shocker, and Bergdah
President Obama addresses the growing violence in Iraq. House Republicans regroup after the defeat of Majority Leader Eric Cantor to tea party upstart David Brat. And Defense Sec. Hagel defends the Bergdahl swap as the former Taliban captive returns to the U.S. Joining Gwen: Nancy Youssef, McClatchy; John Harwood, CNBC; Robert Costa, Washington Post; Mark Mazzetti; New York Times.