Congress has only declared war during five conflicts, but the United States has used military force more than 100 times. Was this executive overreach, or does the president have the power to deploy military force without congressional approval? Professor John Yoo of Berkeley Law argues that the declaration of war does not commence hostilities but “perfects” them. 

Learn more about John Yoo:
https://www.law.berkeley.edu/our-faculty/faculty-profiles/john-yoo/

As always, the Federalist Society takes no position on particular legal or public policy issues; all expressions of opinion are those of the speaker.