This report discusses Iran’s influence over the post-Saddam government in Iraq, which is substantial because the predominant parties in that government have long enjoyed Tehran’s sponsorship. An emerging concern is that Iran’s influence has extended to support for militant groups in Iraq. Some U.S. statements and press sources say that sophisticated explosive devices are entering Iraq from Iran, suggesting that Iran, or factions within Iran, are backing Iraqi factions that use violence to oppose the U.S. and allied military presence in Iraq.

Operation Iraqi Freedom succeeded in overthrowing Saddam Hussein, but Iraq remains unstable because of Sunni Arab resentment and a related insurgency, now compounded by Sunni-Shiite violence that some believe is a civil war. This report discusses the background of the issue and examines several security challenges, response, and other policy options for the U.S.

Operation Iraqi Freedom succeeded in overthrowing Saddam Hussein, but Iraq remains unstable because of Sunni Arab resentment and a related insurgency, now compounded by Sunni-Shiite violence that some believe is a civil war. According to its November 30, 2005, “Strategy for Victory,” the Bush Administration indicates that U.S. forces will remain in Iraq until the country is able to provide for its own security. This report discusses security challenges, responses, and policy options.