Comment: No one contends that Rubio is an American citizen.

(See in situ)

In reply to comment: Am I missing something? (see in situ)

No one contends that Rubio is an American citizen.

He is NOT a natural-born citizen eligible for the presidency.

In order to be a natural-born citizen, you not only have to be born in America but your parents must be citizens as well. Rubio is born to immigrants. The founding fathers were very well aware of this and wanted citizens to be 3 generations deep in order to be eligible for the presidency.

Therefore Marco Rubio's children would be considered natural-born citizens and thus eligible for the presidency, but not Marco. Hope that helps.