Republican Hypocrisy

Last week was definitely a show of Republican hypocrisy on parade. After Obama proposed opening up trade with Cuba, the Republicans were out in force denouncing him. Why? What possible problem is there with trading with Cuba? I don't like their government either, but wouldn't trade help to correct that? Capitalism works political wonders. It worked with Russia. It would work with China if the neocons hadn't turned it into their personal slave labor camp. So why are they so set on not having any relations with Cuba? We trade with countries that are worse. Are the republicans still so upset about things that happened 50 years ago? Or are they afraid of losing Florida if they don't support the Cuban exile community?