"They want a visceral sense that the United States has their back. And they don't have that sense," said Jon Alterman, director of the Middle East program at the Center for Strategic and International Studies in Washington. "There will be an effort to get the United States to commit to knocking back Iranian regional malfeasance, and I think probably some reluctance from the United States, for example, to get directly involved in Yemen and other places. And that's probably going to be some issue of contention."
Mr. Alterman said the Gulf states have significantly different concerns about Iran than the U.S. does.