Ted Cruz as a minor child of an American citizen was under the jurisdiction of the United States from the day he was born.
He was born under the jurisdiction of Canada! He is a natural born Canadian.
Here is the James Madison definition of NBC.
It is an established maxim, that birth is a criterion of allegiance. Birth, however, derives its force sometimes from place, and sometimes from parentage; but, in general place is the most certain criterion; it is what applies in the United States.
So Madison was for anchor babies?