HUH, are you being sarc ?
Nope. His parents came from Cuba legally and got “permanent residence” here, and did not get their citizenship until 4 years after Mario was born. He was not born to two US citizens, though he was born in the USA.
You may have missed the discussions here about Obama, how he was not born to two US citizens and was ineligible for the presidency, but it was a hot topic.
Mitt Romney’s dad was born in Mexico but became a citizen before Mitt was born, so he was a natural born citizen.