Natural born citizens can only come from citizen parents.
Foreign nationals beget foreign nationals.
The part after the comma, “or a citizen of the United States at the time of the adoption of this Constitution” was to grandfather themselves in and they also knew there were not going to be any natural born citizens eligible for 35 years.
http://www.art2superpac.com/issues.html
In the case of obama; no one knows where the bastard was born. His father was not a citizen; his mother denounced her own citizenship as she trapesed all over the 3rd world shithole countries.
The Founding Fathers never intended to eliminate true American citizens...which the Trump children are. What is your problem?