Wow. Lots of things to remember to figure out what "natural" means. And I bet that list is subject to change every time congress gets a new hair up it's @$$.
Funny, I always thought only a constitutional amendment could change a constitutional requirement. Didn't know congress could do it with a vote.
The law is based on the Citizenship Clause of the 14th Amendment which is a corollary to Article II, Section 1. They fit together nicely: anyone who is a Citizen of the United States At Birth under the 14th Amendment is also a natural born citizen under Article II, Section 1.
As a judge in Pennsylvania ruled in March in a trial on the merits: Having extensively reviewed all articles cited in this opinion, as well as many others, this Court holds, consistent with the common law precedent and statutory history, that a natural born citizen includes any person who is a United States citizen from birth,—Elliott v Cruz,
It's also a definition in natural law. Next thing you know, they'll be passing a law to make the Sun rise in the West.