I don't think you can bring back any Cuban cigars.
^ Link to regulations
"Individuals who are persons subject to U.S. jurisdiction are authorized to import into the United States as accompanied baggage merchandise subject to the prohibitions in
§ 515.204, including Cuban-origin goods, that is purchased or acquired in a third country, provided that the merchandise is imported for personal use only.
This paragraph does not apply to the importation into the United States of Cuban-origin alcohol or tobacco products."