I am not a fan of Newt Gingrich. He is a neocon. No need to say more about him.

CITIZEN [[Merriam-Webster online dictionary definition)
1: an inhabitant of a city or town ; especially : one entitled to the rights and privileges of a freeman
2 a: a member of a state b: a native or naturalized person who owes allegiance to a government and is entitled to protection from it
3: a civilian as distinguished from a specialized servant of the state

Much of this argument has to do with semantics. Sure, everyone is a citizen of the world in the very vague rhetorical and colloquiel definition Obama chose. I suppose its useful to distinguish us from space aliens. Given concerns about Obama's birth held by some, perhaps the citizen of the world definition works especially well for him. However, Gingrich used a more correct dictionary definition. I voted for a US presidential candidate not the president of the UN so I hope that President Obama doesn't enroll us in some international tax scheme proposal for taxation without representation.