From The National Journal:
As the United States military’s intervention in Iraq intensifies, so does the debate between legislative and executive branch officials about President Barack Obama’s muscular use of war powers. In the past ten weeks, Obama has authorized the first U.S. combat operations in Iraq since the war ended in 2011, and sent in roughly 1,000 U.S. troops. The U.S. operation in Iraq is likely to extend beyond the 60-day limit under the War Powers Resolution that triggers congressional approval, meaning Obama may need a different authority to continue the fight.
