How is Fortuno not up there?
The base will definitely turn out to vote for a Mexican.
What Mexican?
One thing you learn in life is to never, never, never call a Puerto Rican a Mexican.
Fortuno being Puerto Rican doesn't change the fact that, if he were Paul's running mate, the GOP base would decide to stay home rather than vote for Ron Paul and the Mexican. But Paul isn't the panderer his rivals are and would probably shrug off the base's rejection of Mexicans and pick Marco Rubio (balance the ticket with someone who has a chance of ending up on the national ticket).