As Kent continued to write, “Subject and citizen are, in a degree, convertible terms as applied to natives, and though the term citizen seems to be appropriate to republican freemen, yet we are, equally with the inhabitants of all other countries, subjects, for we are equally bound by allegiance and subjection to the government and law of the land.”
The United States went to war with Great Britain twice to not be subjects of a king. The second war with England was over the kidnapping of American sailors. The British said, once a British subject always a British subject. No, the United States made a break away from English Common law that had anything to do with being a subject of a king. Our citizenship has nothing to do what post here.