Barack Obama, a former constitutional scholar at the University of Chicago, knows only Congress can declare war. President Obama could make the argument that Bengazi was about to be raped and pillaged and there was no time for a Congressional vote. However he has not made that argument and there has been plenty of time to seek an up or down vote in Congress.
It is interesting that a mandate from the UN moves the President to action and not Congress. If the concern of Samantha Power, Susan Rice and Hillary Clinton is the civilians of Bengazi, the solution is a secessionist partition of Libya into Cyrenica and Tripolitania.
Biden said he would lead a impeachment against an Obama war in violation of the War Powers Act. Don’t hold your breathe.