We have to do better with Hispanics and minorities in general. With Rubio on the ticket he can make an improvement so it depends on who the nominee is. Rubio could do as well as bringing the GOP in the upper 40's amongst them while Mitch Daniels would have the GOP in the mid 20's.
Women, too.
However, Marco Rubio is as useful being a Hispanic to this current Republican party as Sarah Palin was being a woman and the vice-presidential nominee for Republican party in 2008.
For the Republicans, their problem is … their party.
