Why does he need SCOTUS involvement? The power to determine and make the rules of citizenship is not vested in the courts. It is an enumerated power of Congress. And per that power as expressed in Title 8 section 1401, Sen Cruz was a citizen at birth and thus meets the requirements for a natural born citizen.
sorry, but you are just plain wrong.
it is impossible for someone to be born of a foreign national parent, on foreign soil, and still be a natural born citizen. they may claim US citizenship by the single US parent, but not NATURAL BORN citizenship.
title 8 section 1401 deals with citizenship at birth, not natural born status. a citizen at birth is not the same as being a 'natural born' citizen. it has nothing to do with the act of being born, but the circumstance of the birth.
put simply:
a natural born citizen is a citizen naturally... as there are no alternatives.
at birth, TCruz was a US, canadian, cuban citizen and possibly a british subject, depending on the common wealth laws at the time. obviously, he had a few alternatives (one of which, canadian, he relinquished last year)