Actually he is defending the illegality of Zero by trying to make it appear as if he is no worse than McCain. His interpretation is valid only if you assume insane men wrote the Constituition.
Geographic location is irrelevant wrt this. Sovereignty is the issue and parents under the sovereignty or control of the US do not produce non-citizens when carrying out tasks for the sovereign nation. It is a ludicrous concept on its face and extremely damaging to the fight against Zero.
IMHO, You would make a more convincing argument if you used fewer absolutes...