U.S. Secretary of State John Kerry will seek to reassure Gulf Arab officials at a meeting in Qatar soon that Washington will work with them to "push back" against Iranian influence in the region, he told the pan-Arab newspaper al-Sharq al-Awsat. Most U.S. allies in the energy-rich Gulf publicly welcomed a deal between world powers and Tehran over its disputed nuclear program, but they accuse Tehran of interfering in Arab conflicts and pushing hard for heightened regional influence.