Hmm; a Libertarian advises Romney how to win?? He supports the NDAA, Patriot Act, wars (drugs & foreign occupation). His plans expand the debt by $500 billion. He said,"Cutting government spending in the current recession would hurt the recovery." --clearly Keynesian. Advise him on this first.
Also; the Rubio=Hispanic vote gambit is nonsense. Though the're 16% of the population, 2/3 of the "Hispanic" voters are Mexicans who are indifferent to Cuban Rubio. Most of the few who vote are Democrats.
A smart VP pick would be a guy who could deliver the huge swing vote of fiscal-conservative-social-liberals. 39% GOP & 41% Dems means the winner's the one who gets this 20% libertarian "middle". Bonus: Ron Paul brings the youth vote too!