Born here of citizen parents.
Naturally a US citizen because there is no other possibility.
Children of foreign nationals inherit the option of being something else.
I see your point, and I am going to take back what I said before. You are a natural born citizen if you are born in US soil, even if both parents are foreigners, even if they are illegal. If you choose to give up US citizenship, then you lose the “natural born” status because you need to be naturalized to re-gain US citizenship.