GOP -
How about this, instead of nominating a token Latino, why don't you actually try to moderate your stance on the issue.
It isn't about tokenism and I wouldn't even think of the possibility of Rubio as a contender if he was bland and boring "just another GOP Senator", regardless of his Cuban origins. Lets say this were Mel Martinez for instance, instead. The answer would be no.
And if any Republican does seriously think it is that simple, "nominate a hispanic, demographic problem solved", they are seriously delusional. If Republicans win Hispanics, it will be on a message anchored in economic freedom and opportunity, education reform and other such issues. The reason Rubio has such potential, is that he can deliver such a message with passion and some charisma.