Budget Battle, Obamacare, US-Iran relations, Syria

The efforts by congressional Republicans to defund Obamacare over the budget battle, the rollout of the Affordable Care Act's latest provisions on Oct. 1, Obama and Rouhani talk and implications for U.S.-Iran relations, and securing Syria's chemical weapons.Joining Gwen: Gloria Borger, CNN; Karen Tumulty, Washington Post; Doyle McManus, Los Angeles Times and Kimberly Dozier, Associated Press.