Even so, I don't think it will take Fidel long to see the USA as imperalists especially since he no longer has to worry about the CSA, and those poor Mexicans, even after they have their republic, will still need a scapegoat to blame all their troubles on and attribute it to "Yankee Imperialism" This greater USA which includes both Canada and the former CSA including three Mexican states that they have yet to give back to Mexico, makes a very convenient "bogey man" for communist revolutionaries to use as propaganda, and besides no one has really experienced a Communist government in this timeline, so at first the peasantry won't be as critical as they would otherwise be in our timeline's Mexico. Communist is not automatically associated with the loss of political freedom here, as most people are ignorant of what Communism and Fidel's movement in particular is really about - all they know is that he is some kind of socialist who fought the CSA and Jake Featherston and thats it. If Fidel tries to break cuba off of the USA, he will lose. If the USA can conquer the CSA and Canada, do you think a lone Cuba, which is a state, can suceed with its secession? I doubt it, because first Cuba would have to secede, and then it can have its Communist Revolution, the USA here won't see it as a seperate country and thus mind its own business as it does in out timeline, it will instead see Fidel trying to steal some of its territory much like the Confederates did, and they won't even give it a chance to happen. John F. Kennedy on the other hand gave Cuba some breathing space for its Communist revolution to succeed by calling off the Bay of Pigs invasion, but for him it was foreign policy, for the TL-191 timeline it amounts to preserving the Union and unfortunately for Fidel, that Union includes his Cuba.