The CIA is prohibited from conducting operations inside the USA unless it has to do with Spies, or foreigners suspected of spying. But they are definitely not supposed to be burglarizing the DNC headquarters for political reasons
There were Cubans involved--but not in the (June 14) break-in. The Cubans weren't retired (they remained Cuban-Americans), but they did have ties to the CIA, compliments of President Kennedy who stranded them in the Bay of Pigs.