[Joachim]

Wait a second here. Since the Constitution never actually defines the term "natural born citizen," and thus is falls to Congress to define that term, isn't its doing so by statute in effect (per the argument made in this post) making EVERYONE a "naturalized" citizen?

Bingo! But this concept is way too difficult for the small minded among us to grasp.

So Congress gets to define any term in the Constitution undefined in the Constitution?

Who or what granted Congress that power?

[randita]

I will reiterate Post 35.

All actions of the US government are governed by laws. Those laws laws come from acts of Congress. Article 1 Section 8 of the Constitution enumerate Congress with the “Rules of Naturalization”.

(See https://www.law.cornell.edu/constitution/articlei)

The scope of those rules are not limited. The rules include who needs to be naturalized and the rules include who does not need to be naturalized.

The current expression of those rules are listed in Title 8 section 1401. Even those citizens who are born in the US are citizens at birth (Naturally born as citizens) are defined by that law.

(See https://www.law.cornell.edu/uscode/text/8/1401)

It really does help to look these things up before commenting on them.