Bring Cuban Cigars, This is what I found.
Only persons returning directly from Cuba after a licensed visit there are permitted to bring Cuban cigars into the United States, provided the value of such cigars does not exceed $100 US dollars and the cigars are for that individuals personal use and not for resale. All other importations of Cuban cigars are illegal. All offers to buy or sell such cigars in the United States involve cigars that were imported illegally. Contrary to what many people may believe, it is illegal for travelers to bring into the United States Cuban cigars acquired in third countries (such as Canada, England, or Mexico).
It is also illegal for U.S. persons to buy, sell, trade, or otherwise engage in transactions involving illegally-imported Cuban cigars. The penalties for doing so include, in addition to confiscation of the cigars, civil fines of up to $55,000 per violation and in appropriate cases, criminal prosecution which may result in higher fines and/or imprisonment.