"Citizen at Birth" means exactly what it says. That is a law. But being natural born cannot be granted by law. It is what the Law of Nations said it was: born on the soil and of parents who are its citizens. Citzens have all sorts of rights. Only natural born citizens can be president. Most citizens are natural born citizens. Obama may or may not be a citizen. Jindal is, but isn't natural born because his parents weren't when he was born. McCain can't be made natural born by law - which seems unfair, but was put in the constitution for our safety as a nation.
I agree. Natural born citizen is not the same as citizen at birth and the requirements are more stringent for the reasons you cited. Both parents must be citizens.
Has there ever been a President whose father or mother was not a citizen, outside of the first generation who were born in England? No.
That is refreshing. Thanks! Some of the obfuscators are very clever; some appear to be lawyers - but how would I know? I do believe that the great justices, and great thinkers, are clear and concise. John Marshall’s opinions are crystalline. Vattel, while Law of Nations has daunting scope, shows that brevity and clarity in Chapter 19, all that I’ve read carefully. The references thrown out, Sarah Duggin, Gabriel Chin, Sarah Herlihy, are, in my opinion, intended to overwhelm. The references also assiduously avoid the jus sanguinis, or born of citizen parents issue. (I have not read all of the Duggin-Collins paper in detail, it is very long, but a search reveals that nowhere does it even mention Vattel or The Venus)