Ted Cruz would not even have been a citizen of the USA before 1934. So how can someone the founders would not even considered a citizen be a natural born citizen?
"Prior to May 24, 1934, U.S. citizen mothers were not permitted to transmit U.S. citizenship to their children born abroad. The Act of May 24, 1934 (the "1934 Statute") gave U.S. citizen mothers equality of status regarding their ability to transmit U.S. citizenship. However the provision was not applied retroactively. Therefore, children born before May 24, 1934 to a U.S. citizen mother and an alien father did not acquire U.S. citizenship."
http://www.americanlaw.com/citabrd.html
“Anyone that thinks the son of a Cuban, born in Canada is a natural born citizen of the USA as the founders understood natural born citizen is not expert on our Constitution.”
Anyone who thinks the son of a US citizen born abroad isn’t a natural born citizen is not an expert on our constitution.
That's clear enough so even an agrarian can understand...