Born a citizen, is not a natural born citizen. To think that shows a gross lack of understanding concerning this issue, and makes your choice suspect on many levels.
If someone is born a citizen, and therefore does not need to be naturalized, then they are a natural born citizen.
Cruz has a Canadian birth certificate. What document does he display to show he is a U.S. citizen? How do you get a U.S. passport for foreign travel with that? Does he show his mother’s birth certificate? Awkward.