U.S. Secretary of State Marco Rubio concluded a Middle East tour in Bahrain, aiming to secure Gulf Arab support for a preliminary Iran accord. The Trump administration’s deal has faced skepticism from regional allies who worry it may embolden Tehran. Rubio’s visit focused on addressing concerns that concessions to Iran could destabilize the region and impact oil markets. Gulf leaders fear a shift in the regional security balance if Iran’s influence grows. Rubio acknowledged the difficulty of persuading allies already wary of Tehran’s ambitions. The trip represents a key effort to build a consensus around the U.S. approach to Iran.