Natural born citizenship then is equivalent to natural born allegiance.
Allegiance, according to the English common law means: the duty of loyalty and obedience owed by all persons born within the king's realm that attaches immediately upon their birth and that they cannot be relieved of by their own actions. In US law, it means: the obligation of fidelity and obedience that is owed by native born and naturalized American citizens to the United States that cannot be relinquished without the consent of the government expressed by a statutory enactment.
Ted was most definitely born into the allegiance of Canada. According to Canadian law in effect at the time of his birth (the Canadian Naturalization Act of 1947 specifically), he was, in fact, a natural born citizen of Canada.
Though he is a citizen of the United States, he most definitely is not a Natural Born Citizen of the United States. As such, he is not eligible to be POTUS or Vice POTUS.
Stretched and wrong. NBC is as I described it. You are a natural born citizen if you gain your citizenship naturally and not through judicial or legislative action.
Ted was a citizen of the US at birth and required no naturalization... at least he's never been naturalized that I can find. He has enjoyed all of the rights and privileges of citizenship including holding office as a Senator (which has a citizenship requirement).
He was also recognized as a citizen of Canada through Jus Soli, though he and his mother apparently assumed he would have to be naturalized to be a Canadian citizen. Finding out that was incorrect as an adult, he renounced his Canadian citizenship.
As most of the Trump/Birthers are fond of claiming that the only source for understanding constitutional terms is English Common Law.
Blackstone, whose works, we have said, “constituted the preeminent authority on English law for the founding generation,†Alden v. Maine, 527 U. S. 706, 715 (1999)
DC V. Heller.
to wit
“all children, born out of the king’s ligeance, whose fathers were natural-born subjects, are now natural-born subjects themselves, to all intents and purposes” Blackstone Art 1 Sec 8.
note that the United States made no such claim that only Fathers may grant citizenship (vice Subjects)
As to the supercilious notion that one may be born a citizen but not a natural born citizen please feel free to show any case or statute defining this novel 3rd class of Citizens.