It’s amazing how uninformed people are. Obama even admits that he was born a dual citizen.
Of course, if he wasn’t born in the USA he wasn’t even a US citizen at birth; he would just have been British and not American at all. And still wouldn’t be American unless he naturalized at some point.
http://libertylegalfoundation.org/1477/georgia-court-ruled-against-obama/
http://libertylegalfoundation.org/certification-class-action/georgia-ballot-challenge/