“Congress has only once defined Natural Born Citizenship in the First Congress, Second Session, which was a person born in the US with two citizen parents.”
Factually incorrect. The law said that a NBC included those born OVERSEAS of two citizen parents - as was true of the British term, natural born subject.
“and the children of citizens of the United States, that may be born beyond sea, or out of the limits of the United States, shall be considered as natural born citizens: Provided...”
I’m sure you know this, but we must not confuse the ignorant.
Immigration Act of 1790
“....and the children of citizens of the United States, that may be born beyond sea, or out of the limits of the United States, shall be considered as natural born citizens:...”
and REPEALED by the Immigration Act of 1795
“.....and the children of citizens of the United States, born out of the limits and jurisdiction of the United States, shall be considered as CITIZENS of the United States: .....”