From the Summary: "Iraq's neighbors have influenced events in Iraq since the fall of the Saddam Hussein regime in 2003, and developments in Iraq have had political, economic, and security implications for Iraq's neighbors and the broader Middle East. Ongoing insurgency and sectarian violence in Iraq and discussion of options for modifying U.S. policy toward Iraq are fueling intense consideration of Iraq's future and the current and potential policies of Iraq's neighbors. Policymakers and observers are considering a number of different 'Iraq scenarios,' ranging from the resolution of outstanding Iraqi political disputes and the successful consolidation of Iraq's government and security forces, to greater escalation of sectarian violence into nationwide civil war and the potential for greater intervention by Iraq's neighbors. […] This report provides information about the current perspectives and policies of Iraq's neighbors; analyzes potential regional responses to continued insurgency, wider sectarian or ethnic violence, and long-term stabilization; discusses shared concerns and U.S. long-term regional interests; and reviews U.S. policy options for responding to various contingencies. For more information on Iraq and regional perspectives, see CRS [Congressional Research Service] Report RL31339, 'Iraq: Post-Saddam Governance and Security'; CRS Report RS22079, 'The Kurds in Post-Saddam Iraq'; and CRS Report RS22323, 'Iran's Influence in Iraq'. This report will be updated to reflect major developments."
CRS Report for Congress, RL33793