This is unique to US law as far as I’ve seen. If Cruz becomes the nominee, the DNC will file suit in federal court challenging it and they your question will be answered.
An adage amongst lawyers is “never ask a question you don’t already know the answer to”, so the DNC will not want to push this unless they have to, because as long as it remains undefined by a court, they might be able to use it to their advantage at some future time.
And make no mistake, the GOPe will be covertly supporting such a challenge, just not publicly. It is their clearest means of taking out Cruz if it comes to that.
Thanks for your input. See my post #9. If “my” interpretation is correct, then, Obama and Cruz are mute points and the debate of “natural born” needs to be put to rest.
The GOP can disqualify Cruz without going to court. All it has to do is take his delegates, cite Rogers v. Bellei, and then let Cruz sue to get the delegates back.