All born with other citizenships, not naturally an American.
One is only naturally an American when one cannot be anything else.
They are born with only ONE nationality.
That is the quality the founders were seeking.
Someone who was only an American.
Other nations laws are irrelevant with regards to US citizenship. It does not matter if some other nation grants citizenship at birth. Only US laws apply. And US laws say that all were born as US citizens and do not need to be naturalized.
If I go into an Italian consulate with all the paperwork indicating that chain --birth certificates, naturalization papers, marriage certificates, etc.--I can get an Italian passport. Understand, this isn't applying for Italian citizenship. This is proving that I'm already an Italian citizen.
So, here I am, the third generation born on US soil, but Italian law says I'm also an Italian citizen. Am I a natural born citizen?