Now lets talk about why Obama would NOT be a NBC. It has nothing to do with his father other than the absence of US Citizenship. It hinges on three things.
1) what version of the title 8 section 1401 shall be applied? Do we follow the rules at the time of his birth or do we follow current law? That would have to be decided in court.
If we apply the law at the time of Obama’s birth, and we assume he was born outside of the US, then he STILL would not be a NBC because his mother could not have conferred NBC status because she could not have met the residency requirements.
If we apply the law currently, then it is more likely (still undetermined) that NBC could have been conferred. The requirement is 5 years of residence with at least 2 after the age of 14.
2) If he is shown to be born on US soil - moot point. NBC is automatic regardless of citizenship of the parents. I personally dont agree with this but that is the current law and SCOTUS rulings.
3) Even if he did have NBC, did he ever lose his citizenship? It has been argued that his trip to Pakistan could have invalidated his citizenship. Possible but the courts are unlikely to revoke someone citizenship for a travel trip. It normally takes a more egregious action.
You don’t think someone born in the Unites States should be allowed to be president?