That is not anything that is part of the War Powers Act. This is the problem, it's like folks are incapable of understanding why it wasn't against the law for Obama to bomb the crap out of places without begging for permission. It isn't a power of Congress, it is a power of the Executive, and he can do this kind of thing and report it to Congress after, all while following the constitution. This is the very reason why I tell people it is important to understand who you are electing to the Executive.