The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people.
Well, in a purely Constitutional sense if congress doesn't do it then the people or states are the only ones with the power to do it.
Congress took the end around. They didn't want to commit themselves to actually having declared war (much like Vietnam) so they prostrated themselves to the pres in essence saying "we don't want the responsibility so here you go, you take the heat". Already they begin to critisize him for doing what they gave him the (unlimited?) power to do.
It would sit a whole lot better with me if they just took it upon themselves to take responsibility and be answerable to us for it.
EBUCK