You really are clueless to the meaning of a natural born citizen. Look for the Vattel research thread....get educated.
Get educated on Vattel? Did he have any other definitions for citizenship for a person other than Natural Born and Naturalized that I am not aware of? Not from my understanding. With those two choices also in the Constitution, Rubio falls under NB.
BTW, was there a Constitutional crisis for Chester A Arther when he was President? His father was born in Ireland. Folks had a very clear idea of the Constitution in those days since it was less that 100 years old. I think I will take their advice on the definition of Natural Born.