Nobody has ever convinced me (except temporarily) that there are people who were citizens at birth who are not Natural Born Citizens.
“Obama” is not any kind of citizen. He was a British Subject at birth, and is now a British Subject and/or an Indonesian citizen. Since he was not an American citizen at birth, he has never been and never can be a Natural Born Citizen.
And that argument went nowhere ... in the last six years ... :-) ...
But don’t worry, we now get to contend with a Canadian ... Ted Cruz ...