Marco Rubio and Mitt Romney are both fully qualified to become president. Where their parents were born has nothing to do with their qualifications.
I have some doubt as to Obama’s actual birthplace but it is a bit late to raise a challenge on where he was born. We'd be better served by focusing on what he's done while in office...
Chester Arthur’s father was not a US citizen at the time of Chester’s birth.
In another 100 years it is possible that a Mexican citizen born in Mexico can become US President...and no,I am not joking. We are throwing the doors wide open