The Supreme court case of 1875 Minor V Happersett, 88,U.S. 162 set precedent that has not been overturned that natural born citizen is defined as born on U.S. soil to two citizen parents. Rubio does not meet that requirement like it or not.
http://www.youtube.com/user/82009pol#p/f/40/aIUSSWJSeV4
If he does he will be serving illegally just as Obama is illegally serving as President of the U.S. We all know liberals and Democrats don’t give a rats rear about the Constitution or abiding by the rule of law perhaps Republicans won’t either.
Either way the issue is not going away until it is resolved.