I think this highlights an important point. "Making Cuba Communist" depends alot on just where you stand on the highly-charged debate of where regulated capitalism stops and socialism begins. The Agrarian Reformers of Latin America during the Cold War were a CONSTANT topic of debate between the strict advocates of Containment and those who favored "dentante" by dancing around that line in terms of their policies of land repurchase and distribution, public development of natural resources to produce state-run utility companies, anti-corruption campaigns, ect. I'll admit, I'm not an expert on Castro and his particular ideology, but I think the deciding factor would be the question of weather or not he pushes for moves that would shift the sugar land and processing facilities out of the hands of forgien capital. They can go after the Mafia, adopt quantative easing policies, ect. and the optics will certainly be on their side, but taking overtly anti-American moves will likely create a vicious cycle as it results in the US backing alternatives (Like Marquez, for example), thus obliging them to turn to the USSR for trade and defense which would oblige at least a superficial turn to Communism, which produces more US hatred, ect.