Why Marco Rubio will never be Mitt Romney's running mate

Clearly, Marco Rubio is unqualified to be Mitt Romney's running mate:

Marco Rubio on self-deportation for undocumented immigrants: "I have never understood self-deportation as a policy."
' @Chris_Moody via TweetDeck A Republican who doesn't understand and embrace the concept of making brown people's lives so miserable that they flee the United States? Heresy!