Well, there goes Florida for Sanders. Lots of Cuban dissidents in Florida, many of whom have lost friends and family members to Castro's loving version of Communism. Many Cubans in the State escaped from Castro's gulag country. Don't know what Sanders thinks he is doing, but a large percentage of American Hispanics absolutely HATE Fidel Castro. By showing Castro love, Bernie is confusing his Hispanic base. This doesn't mean they will vote for Trump, but the nightmare of Cuba will keep them from voting for Sanders.
They do not want to live through that horror again.