If Cruz's parents got him into the US without a baby passport or birth certificate proving him a US citizen they must of carried him in the spare tire well. Note also that even so, it's not proof of non-citizenship and they could obtain a CRBA anytime up until 1988.
About "natural born citizenship"; according to the both parents citizen theory neither Adams nor Jefferson qualified because their fathers died well before citizenship could have been assumed or conferred.
Back to Rubio, my real concern in this discussion is that Magic Marco would lend legitimacy to anchor babies' right to sit as president (which I note is already being claimed on some internet sites).
About “natural born citizenship”; according to the both parents citizen theory neither Adams nor Jefferson qualified because their fathers died well before citizenship could have been assumed or conferred.
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You conveniently ignore the Constitution which says, “or a citizen of the United States , at the time of the Adoption of this constitution, shall be eligible to the office of President;” July 4, 1776 was the date upon which former SUBJECTS of the British Crown became CITIZENS of the United States of America. To even suggest that the author of the Declaration of Independence was not eligible is pure fantasy.