'Natural Born Citizen' simply means, a person born a Citizen according to the law of nature.
What is important about the 'law of nature'? There is a legal term Jura naturæ sunt immutabilia - and it means, "The laws of nature are unchangeable".
The Congress CAN NOT declare a person a 'Natural Born Citizen', because they CAN NOT change the definition, it's immutable.
The idea that Ted Cruz meets the NBC clause is ridiculous, Ted Cruz is a US citizen NOT by natural law, but by statutory law, as written in the Immigration and Nationality Act (either section 301, or section 320).
Just look at the titles of the chapters those sections are in! The title of the chapter section 301 is in - CHAPTER 1 -- NATIONALITY AT BIRTH AND BY COLLECTIVE NATURALIZATION. We know that Cruz was not considered a 'US National', he is a Citizen, so his citizenship would be from "COLLECTIVE NATURALIZATION". The title of the chapter containing section 320? CHAPTER 2 -- NATIONALITY THROUGH NATURALIZATION, that says it all, all persons who are 'citizens at birth' through these sections, are citizens "THROUGH NATURALIZATION". Also, these are not really 'Citizens at birth', the are 'Citizens BY birth'. There is a BIG difference (and you will notice that Cruz 'spokespeople' will always say 'by birth'), persons who automatically acquire Citizenship via section 320, are not actually a US citizen until they move to the US and establish permanent residence.
That is why it was always clear that you must be born on US soil to be president, because ALL US citizens, born outside the US, even if a citizen at birth, are 'naturalized US citizens', and NOT 'natural born Citizens'.
Your theory is NONSENSE, it carries no weight at all. NOBODY of any importance has EVER agreed with you.