WERE BOTH HIS PARENTS USA CITIZENS WHEN HE WAS BORN IN CINNCI?
See my post#33. Being born on U.S. soil is the only unambiguous qualifier. Otherwise, where is the starting point of citizenship? The colonies were started by immigrants (not U.S. citizens) Applying your premise, their offspring could not be natural born US citizens either. Hence, all subsequent generations would not be as well. What is the cutoff point?