The idea that the Constitution is referring to Vattel’s “Law of Nations” is laughable. It takes a remarkable person to repeat such folly. You ignore the main point being that De Vattel had a huge influence on our Founding Fathers of a new nation that went its own way breaking away from the King of England and his laws.
Benjamin Franklin testifies to this fact in his Memoirs that I stated:
Yes, they used Vattel’s book. They did not adopt it as binding law. And the idea that the Constitution or Kent were referring to Vattel’s book remains laughable. What are the offenses against Vattel you would have the Constitution refer to?