Summary: The controversial prisoner swap that freed Sergeant Bowe Bergdahl in exchange for five Taliban commanders, and two high-profile GOP Senate primaries, Iowa and Mississippi, where six-term incumbent Thad Cochran is now facing a runoff election with tea party challenger Chris McDaniel. Joining Gwen: Molly Ball, The Atlantic; Ed O'Keefe, The Washington Post; David Sanger, The New York Times.
