[gusty]

Since we separated from England and not Switzerland, I think you are dead on.

[RC one]

yeah, and there's that. Natural born citizenship has always been a matter of allegiance and President James Madison had this to say about allegiance:

It is an established maxim that birth is a criterion of allegiance. Birth however derives its force sometimes from place and sometimes from parentage, but in general place is the most certain criterion; it is what applies in the United States; it will therefore be unnecessary to investigate any other.

James Madison is also known as the Author of the Constitution incidentally.