MIAMI — Promising boycotts, protests and strikes, Cuban exile leaders expressed their fear that two Miami stations, Radio Mambí and WQBA — which have traditionally advocated for Cuba’s freedom — would be silenced after being bought by Latino Media Network, a media company run by “social activists with a left-wing progressive political agenda.” TelevisaUnivision, Inc. reached an agreement to sell 18 stations, including Radio Mambí and WQBA, in different cities, to Latino Media Network (LMN), founded by Stephanie Valencia, who worked in the White House as a special assistant to the president and…
