The “Law of Nations” referenced in the Constitution refers to international law, not a treatise by de Vattel. Yes, I know it’s capitalized, but so are many other terms that don’t refer to proper nouns, titles or names. It was the writing style of that era.
The ‘Law of Nations’ is a writing STYLE??? The Founding Fathers would embed a writing Style into the Constitution???That Franklin was given a copy of Vattel’s treatise and others at the convention had and read copies of the treatise and all were only interested in embedding a writing STYLE??? Hard to take as an established act by the Founders. More reasonable to believe the Founders knew what they were referring to; and might well have taken Jay’s hint to Washington that only a ‘natural born citizen’ be allowed to be POTUSA which is how this was written into the Constitution with definition by the Law of Nations.