Explain what? The fact that you are wasting your time whining about the "legality" when it has been already established since the XYZ affair which led to the Quasi-War from 1798-1800 between the United States and France? Why are you not marching in the streets to have John Adams dug up and his body impeached?
Or is it that you just have never read a day of history in your life?
There are a lot of things that get done illegally, which people get away with doing, as in the case with
Libya. It may very well set a precedent, but not a legal one by any means. There is a constitution for a reason. Nice try at deflection though. Like I said, read the constitution. Then read it again. Or, you can keep trying way too hard to portray yourself as a pseudo intellectual by digging up obscure historical examples that have no relevance to the topic.