Washington's determination to defend much of the globe has made the United States an international sucker, especially vulnerable to manipulation by supposed friends. Today the Gulf states are upset.
The basic "problem" in their view is that Washington is pursuing the interests of America, not Saudi Arabia & Co., which is seeking hegemony over the Gulf. The administration organized a summit to assuage their concerns, at which he promised to defend them.
They complain that Washington negotiated to prevent Iranian acquisition of a nuclear weapon rather than demanded Tehran's surrender when that country said no, as it almost certainly would have. Even though forestalling development of an Iranian nuke would dramatically improve the region's security environment, the Gulf nations worry that eliminating sanctions would increase Iranian revenues.