if she was referring to an ecomonic blockade (US Cuban goods in out) then yes we have that. If you are referring to a "blockade" where no one is allowed in or out then that would be incorrect.
I could charter a boat to Cuba and do what i wanted etc. nobody would stop me except maybe the cubans. But I am supposed to inform the US goverment of my intention to goto Cuba. When, where, and for how long. The VISA would be another matter. The reprecussions of going without informing them are unknown to me. The could of course deny me the request if the felt inclined to. But yet again I am an American this could all be propaganda.