[OneWingedShark]

Mr Cruz’s NBC status flows from the enumerated powers of Congress

And you lose; the only power congress has over citizenship is that of establishing a uniform rule of naturalization; see Art 1, Sec 8.

The current will of Congress is expressed in Title 8 section 1401.

Which flows from congress's power over naturalization, or else is an usurpation of powers.
What good is a Constitution at proscribing limits on a legislature if the ordinary operation of the legislature may alter it?

[Godebert]

Bingo!

[taxcontrol]

the only power congress has over citizenship is that of establishing a uniform rule of naturalization; see Art 1, Sec 8.

Yes that is THE ONLY POWER over citizenship - to say who does and does not need naturalization. Those are the rules of naturalization. If a person is a citizen at birth, they do not need naturalization and thus are a natural born citizen. The Constitution DOES NOT LIMIT Congress in the area of citizenship. It give Congress the full authority to determine the rules of who is and is not a citizen at birth.