There are growing calls for a decrease in the U.S. military presence in the Middle East. This CSIS report assesses three posture options for U.S. forces in the region to inform the debate over the United States’ military presence in the Middle East. The report finds that the United States should keep a notable but tailored presence in the Middle East to contain the further expansion of Chinese and Russian military power and to check the actions of Iran and terrorist organizations that threaten the United States and its allies and partners.