Ref:”Would Cruz be eligible if he were born in 1789 when the Constitution was created?... Then he is not a natural born citizen as originally intended.”
Apparently you did not read the sections from the Naturalization act of 1790 which were included by Yosemitest in the post. The act was supported and signed by many members of the Constitutional Convention. Cruz falls squarely into their definition of Natural Born Citizens.
http://www.newswithviews.com/JBWilliams/williams300.htm
Interviewer: “Hello Mr. Cruz, it's a pleasure to meet you. My name is (redacted). I am a (redacted) County GOP Precinct Chair and you have my support and vote. I have one question for you if I may?”
Cruz: “Sure, go ahead.”
Interviewer: “What is your understanding of how one becomes a natural born Citizen?”
Cruz: “Two citizen parents and born on the soil.”
Interviewer: “Not exactly, but as I don't have enough time to fully explain how one does become an natural born Citizen, based on your understanding, would you agree that Barack Obama is ineligible to be POTUS?”
Cruz: “I would agree.”
Interviewer: “So when we get you elected, will you expose him for the usurping fraud he is?”
Cruz: “No, my main focus will be on repealing Obamacare.”
Interviewer: “But Mr. Cruz, if he is exposed as the usurping fraud he is, everything he has done will become null and void. Everything!”
Interviewer: “At that point, Cruz reiterated his main concern, so it was obvious the conversation was over as far as Cruz was concerned. I thanked him for his time and wished him success in the runoff.”