Amash noted that the War Powers Act (WPA) lets the president commit troops for up to 60 days without permission from Congress, and said the administration would be in violation of the WPA if congressional authorization is not granted after Friday. But he also argued that the WPA only allows troop commitments for reasons related to self-defense, which he said means the WPA was never a legal justification for the U.S. military's participation in Operation Odyssey Dawn in Libya.

"In fact, the administration has been violating the WPR from the moment the first bomb dropped on Libya," he wrote.

The House Foreign Affairs Committee has scheduled a hearing on Wednesday that will allow various members of Congress to offer their views on whether Congress needs to accept, reject or condition further military involvement in Libya.