:: is defined based on at least one parent who is an American citizen ::
Here is where I depart. The founders included the NBC phrase as was common knowledge among the citizens of the colonies. NBC meant born of citizens parentS[sic-plural] on US soil or abroad while in service to the US.
When born to a parent of different nationality, does that confer citizenship to the other country?
Look at it in the inverse, what is the ^full^ citizenship status of a child born in New York City in 1776 of a father who is a US citizen and a mother who is a French colonialist from New Orleans?
Don’t we recognize the Frencgh citizenship of that child (dual citizenship) and, at some point, have that child accept or renounce their French rights?
Do you consider this child eligible for POTUS?
Actually, the early laws don't say that. If you study the wording, you'll realize that only the father had to be a US citizen.
NBC.