You could learn much from reading the commentaries of Justice Wilson, 1791 & Justice Story, 1833.
http://constitutionallyspeaking.wordpress.com/understanding-your-constitution-historical-references/
Something eludes me here. My question is this: In the 20th and 21st centuries, has the United States government ever differentially classified US citizens on US government-issued visas, passports, military papers, census documents, etc as being either (1) a citizen, (2) a natural born citizen, or (3) a naturalized citizen?
One would assume that if the US government had always intended to maintain a legal distinction between each of three types of citizenship, then it would have established a rigorous system for doing so by now. Yet the US government hasn't. It only keeps track of two types of citizenship.
Why is that?