Trump is waging war against group that didn't exist when the authorization of military force passed
Excerpt:
It is frankly amazing, Sen. Bernie Sanders told The Daily Beast, that the president is using the 2001 AUMF to wage war against a group, ISIS, which did not exist when it was written and passed.
Sanders, who recently termed the war on terrorism a disaster, sounded similar tones without mentioning the Kaine-Flake AUMF specifically.
A new AUMF must be clear and specific about who we are fighting, the mission objectives, and reporting requirements from the president. It must explicitly affirm U.S. compliance with international law, and include a sunset clause to enable Congress to reexamine the AUMF after several years and decide whether it is still necessary and appropriate, Sanders said. The American people do not want to be engaged in never-ending wars all around the world.
https://www.thedailybeast.com/congress-could-accidentally-unleash-trumps-war-powers