RR’s parents were U.S.citizens. His grandparents do not matter.
Correctumondo! However, in my case my mother was born in Canada; ergo, I am not a natural born citizen under Article II; Sec. I; U.S. Const. I am not eligible for the presidency along with The Messiah. And the Messiah's continuing destructive tenure as president shows the wisdom of the Founding Fathers in sticking that clause in there.
This is true. But the parents were not citizens at the time of Marco Rubio's birth. That is where the issue lies. They were here legally, they subsequently became American citizens but it is not clear that this fits with the definition of Natural Born Citizen.
As I understand it, the idea of Natural Born Citizen as a qualification for the Presidency arose out of the founding fathers fear that someone with divided loyalties (U.S. vs. England for example) could be elected President. If your parents were British citizens resident in the U.S. there would be the possibility of such a thing happening. This would have been tragic had it happened in the early years of our country, years when the possibility of the English monarchy reestablishing its rule over our 'renegade' colony were quite real.
This is not a knock on Marco Rubio. He is certainly a rising star in the GOP and he would very likely make a good President. But the issue of his eligibility is real and cannot simply be tossed aside because we all like the guy.