I disagree. After having read much of rxsid’s and bushpilot’s research, it’s clear what the original meaning was, both soil and parentage.
It doesn’t require any great deal of research. Vattel is very plain:
§ 212. Citizens and natives.
The citizens are the members of the civil society; bound to this society by certain duties, and subject to its authority, they equally participate in its advantages. The natives, or natural-born citizens, are those born in the country, of parents who are citizens. As the society cannot exist and perpetuate itself otherwise than by the children of the citizens, those children naturally follow the condition of their fathers, and succeed to all their rights. The society is supposed to desire this, in consequence of what it owes to its own preservation; and it is presumed, as matter of course, that each citizen, on entering into society, reserves to his children the right of becoming members of it. The country of the fathers is therefore that of the children; and these become true citizens merely by their tacit consent.
To be an NBC requires 100% Jus Sanquinis and U.S.Jus soli. One must be 100% American to be President. BOTH Parents must be citizens at the time of birth of the child IN the US. No exceptions.