New CRS opinion on "natural born citizen"
I know this is becoming an issue between Trump and Cruz, and wanted to call attention to recent Congressional Research Service memo. English law imposed some restrictions on persons who were not natural born subjects (they couldn't be appointed to the King's privy council, for instance) and so the subject was debated and defined for many centuries before the Framers drafted the provision. The memo concludes that persons born outside the US to parents who are citizens qualify as natural born citizens.
I can see that, but also an argument that the 14th Amendment defines as citizens those born within the U.S. and those naturalized into it, so that anyone not born here is naturalized (either individually or en masse by statute). On the other hand, might the 14th Amendment be seen as an addition that extended citizenship to everyone born here, so that it's not the exclusive definition of citizenship, but added on to the existing concept? I'd have to do more research than I am likely ever to have time to do before reaching a conclusion.