Yeah, this was another RWNJ meme that spread around after the full birth certificate came out and many of them accepted that he was born in Hawaii. They dug up from French philosopher from the 1700s (because you know how much teabagger love Frenchies) who made a distinction between native-born citizens (those merely born in the country) and natural-born citizens, who must have both parents be citizens. That was Obama would be disqualified no matter what.
Of course, it makes you wonder why they never thought of that before going through five years of rigamarole about birth certificates…