Chester Aurther. Look it up.
.Oh and, in case you missed it: Post 47.
it does not appear that the United States has ever had a President who wasn't born in the United States to parents who were both United States citizens. There have been Presidents who had one parent born abroad, but as far as Applicant has been able to verify, in each of those cases, the alien parent had become a Citizen prior to giving birth to their child who later became President."