Made up birther bunk. Unfortunately, birthers have backed themselves into a corner with their nonsense and now in order to be consistently full of crap, they have to apply their nonsense to good conservatives like Marco Rubio.
Therefore, either...
#1. Rubio has to be considered a "NATURAL BORN" citizen.
or
#2. Rubio has to be considered a "NATURALIZED" citizen.
To be "NATURALIZED" as a citizen, there are specific rules, declaration filings, and steps that one must take to be legally declared a "NATURALIZED CITIZEN". If you do not take these steps, and you do not have a legal "residency" status, then you are here ILLEGALLY!
SO......if Rubio is not #1, and he has not complied with #2, you have to then believe and declare Rubio as being here ILLEGALLY!