He was born a U.S. citizen. that's all that matters.
Nope. To be a President, to hold that one singular office, the Founding Fathers had a higher standard than merely being a citizen.
To be the President one has to have no ties to another country, either by blood or by birth place.
Imagine, if you will, that McCain was elected. What would be his appropriate action if like Honduras, the local president tried to suspend the Panamanian constitution and become dictator for life?
Anything he does or doesn’t do would be seen as being influenced by his Panamanian birth.
This is why the Founding Fathers used that singular term ‘Natural Born Citizen’ for that office and nowhere else. They followed Vattel and Blackstone’s definitions: A child born of citizen parents, on the country’s soil.
So "anchor babies" born to illegal aliens in the US are eligible to be president someday? I think not.