Involved) stances and actions on Cuba and being viewed as playing nice with the Castros. I recall Obama’s approval rating plummeting in SoFla for that reason.

I guess Hillary was able to distance herself from those positions much better than Biden. Would also note that Cubans voted pretty strongly for Reagan and both Bushes and traditionally have been pretty conservative. Obama briefly reversed that trend (largely by getting younger voters to support him) but lost much of his goodwill, and Biden never really had it.