Cuba is expelling foreign correspondents because they are engaging in "negative" reporting. Negative reporting, in this case, is construed as not toeing the government line; for not publishing their press releases without comment.
Leftist idiots, I'm sure, will come up with a plausable explanation for this-- something along the line about corporate media and right-wing elements in the U.S. government trying to smear the only true people's government on earth. Losing that argument they will always return to the tried and true: reminding the world how wonderful Cuba's health care system is and how literate and educated Cubans are.