As a foreign head of state, he and his family hold diplomatic immunity and are not under the jurisdiction of the U.S. Really, can't you Birthers come up with more appropriate analogies?
This is the problem that was addressed in our Constitution, and was never amended to allow.
And where does the Constitution define natural-born citizenship.
The Justice Marshall defined it in the Venus decision as early as 1814 and his definition has never been challenged -- until today by the Obotocrazies.