>> representatives from gulf nations are in the united states for a summit at camp david with president barack obama. on the agenda is iran's nuclear deal regional security and the isil threat. >> as they arrive for dinner one by one on the south lawn of the white house, there is a noticeable absence the kings of saudi arabia and bahrain decided at the last minute to stay away. despite that in the oval office with the crown prince of saudi arabia u.s. president barack obama stressed the alliance. the president wanted to reassure gulf allies that any potential deal over the iran nuclear program won't put them at risk. ben rhodes told me when it comes to the issue of a new defense treaty, that isn't going to happen. >> a treaty is not something we're looking at.