Via FAS – CRS report – A New Authorization for Use of Military Force Against the Islamic State: Issues and Current Proposals, Matthew C. Weed, Specialist in Foreign Policy Legislation, January 15, 2016.

“As military action against the Islamic State has evolved and increased, many observers, including a number of Members of Congress, have raised numerous questions and concerns about the President’s authority to use military force against the Islamic State. Some efforts began near the end of the 113th Congress to consider enactment of a new authorization for use of military force targeting the Islamic State, and have continued into the 114th Congress; the issue, however, remains contentious. The President provided Congress a new authorization proposal in February 2015, and recently has again called on Congress to enact a new authorization for use of military force (AUMF) targeting the Islamic State . The Obama Administration’s official position on presidential authority to use force against the Islamic State, however, has remained constant, relying on the previous 2001 and 2002 AUMFs against those who perpetrated the September 11, 2001 , terror attacks, and the Saddam Hussein regime in Iraq, respectively…”