>there is nothing illegal about two countries trading No, there isn't. There also isn't anything illegal about the USA threatening to tarrif it's own trade wit

>there is nothing illegal about two countries trading No, there isn't. There also isn't anything illegal about the USA threatening to tarrif it's own trade with countries that trade with Cuba. If a vessel fakes it's flag to avoid that attribution, it is then stateless, and the USA is allowed to board it.