A concept unsupported by law or any section of the Constitution I'm aware of. Nor by a considerable body of foreign precedent.
So you argument that being born in America makes one an American AT birth, while true, in no way refutes the argument that being born in America does not make one an American BY birth.
I'm suggesting that it does. We recognize two types of citizenship; citizenship at birth and naturalized. If citizenship at birth and natural born citizen are not synonymous then you'll have to point out where that is detailed.
Do you acknowledge that Obama held dual citizenship at birth, if he was born in the U.S.? Do you realize that he became a naturalized citizen when his British citizenship expired, according to his own assertion on his website? [BTW, aren’t those obamanoid worship kneepads too tight for you?]