America's armed forces are working with some 60 nations to degrade and destroy ISIL, a terrorist group that has committed countless barbaric atrocities and poses a grave threat to the people and territorial integrity of Iraq and Syria, regional stability, and the national security interests of the United States and its allies and partners. Coalition air strikes have been instrumental in disrupting ISIL's command and control and supply lines and taking out their commanders and fighters. Although the President already has the legal authority he needs to take action against ISIL, he has noted that the U.S. is strongest as a nation when the President and Congress work together. A bipartisan authorization of the use of military force (AUMF) against ISIL would provide a clear and powerful signal to the American people, to our allies, and to our enemies that the U.S. is united behind the effort to degrade and ultimately defeat ISIL.