"Section 3 of the War Powers Resolution requires the President "in every possible instance" to consult with Congress before introducing U.S. Armed Forces into situations of hostilities and imminent hostilities, and to continue consultations as long as the armed forces remain in such situations. The House report elaborated: A considerable amount of attention was given to the definition of consultation. Rejected was the notion that consultation should be synonymous with merely being informed."
http://www.fas.org/man/crs/RL32267.html
Now, "ranking member of House Judiciary John Conyers comes out very strong, calling for an emergency session of Congress:
“Article I, Section 8, clause 11 of the Constitution grants Congress – not the President – the power ‘to declare war,’ stated Conyers. While the legislative and executive branches have long grappled over the exact division of powers in times of war, the Constitution grants sole authority to the Congress to commit the nation to battle in the first instance. That decision is one of the most serious that we are called upon to make and we should never abdicate this responsibility to the President. I therefore join my colleagues on both sides of the aisle in calling for an immediate session of Congress to review United States military engagement in Libya.” Conyers also pointed to a line of legal precedent and history supporting this proposition."
http://news.firedoglake.com/2011/03...r-libya-mission-without-congressional-action/