[TigerClaws]

Had Cruz’s mother not gone to the Embassy and filed out the right form after he was born in Canada, would Trump be a citizen today?

IF the answer to that is no = not a NBC.

Cruz owes his citizenship to the naturalization process.

[Yosemitest]

" Had Cruz's mother not gone to the Embassy and filed out the right form after he was born in Canada, would Trump be a citizen today?
IF the answer to that is no = not a NBC."

I think you meant Cruz instead of Trump.

I ask someone before, "What was the first year that the FS-240 were require/issued at the time of birth?"
Cboldt answered:

... the answer was prefaced with a note that the form isn't and wasn't "required" in order for citizenship to attach.

The whole point is in the "Naturalization", or the laws defining it.
What is the root word of "Naturalization" ?

"Naturalize" !
"admit (an alien) to rights of a citizen," 1550s (implied in naturalized),
from natural (adj.) in its etymological sense of "by birth" + -ize;
in some instances from Middle French naturaliser, from natural.
Of things, from 1620s; of plants or animals, from 1796.
Related: Naturalizing.

Not only could the Founding Father define "natural born citizen", BUT ... THE FOUNDING FATHERS DID DEFINE IT !
And you ARE refusing the definition of "natural born citizen" CLEARLY DEFINED by our FOUNDING FATHERS !

Ted Cruz's PARENTS fulfilled ALL those requirements of the law that time, for Ted Cruz to be a "Natural Born Citizen".
Ted Cruz did NOT NEED a Court and a Judge to "Nationalize" him.

“Senator Cruz became a U.S. citizen at birth, and he never had to go through a naturalization process after birth to become a U.S. citizen,” said spokeswoman Catherine Frazier.
... The U.S. Constitution allows only a “natural born” American citizen to serve as president.
Most legal scholars who have studied the question agree that includes an American born overseas to an American parent, such as Cruz.

"Natural Born Citizen" was defined for the United States, BY OUR FOUNDING FATHERS !

The Naturalization Act of 1790, let's read it !

United States Congress, "An act to establish an uniform Rule of Naturalization" (March 26, 1790).

Be it enacted by the Senate and House of Representatives of the United States of America, in Congress assembled,
That any Alien being a free white person,
who shall have resided within the limits and under the jurisdiction of the United States for the term of two years,
may be admitted to become a citizen thereof on application to any common law Court of record in any one of the States
wherein he shall have resided for the term of one year at least,
and making proof to the satisfaction of such Court  that
he is a person of good character,
and taking the oath or affirmation prescribed by law
to support the Constitution of the United States,
which Oath or Affirmation such Court shall administer,
and the Clerk of such Court shall record such Application, and the proceedings thereon;
and thereupon such person shall be considered as a Citizen of the United States. 


And the children of such person so naturalized,
dwelling within the United States,
being under the age of twenty one years at the time of such naturalization,
shall also be considered as citizens of the United States. 

And the children of citizens of the United States that may be born beyond Sea, or out of the limits of the United States,
shall be considered as natural born Citizens: 
Provided, that
the right of citizenship shall not descend to persons whose fathers have never been resident in the United States: 
Provided also, that
no person heretofore proscribed by any States, shall be admitted a citizen as aforesaid,
except by an Act of the Legislature of the State in which such person was proscribed.