Wow, it must be weird being blind, deaf, and living under a rock. Those reasons for invading Iraq weren’t mentioned AT ALL during the runup to the war, and they really aren’t a casus belli anyway.
Congress voted against sending troops to Libya, but that didn’t stop Obama. And that wasn’t even a war that the right-wing was drumming up support for. Why do you think Congress would have been able to stop Bush, then?