The article discusses the U.S.'s relations with the Persian Gulf countries of the Gulf Cooperation Council (GCC) within the context of the 2015 Iranian Nuclear Deal. An overview GCC's concerns on Iran's relations with the Middle East, including in regard to Iran's fight against the terrorist organization the Islamic State in Iraq and Syria (ISIS), Iranian support for the Syrian President Bashar al-Assad in the Syrian Civil War, Iran's relations with the Iraqi government and claims of Iran's support for Houthi rebels' in the Yemen Civil War, is provided