Last week President Trump dealt another blow to the U.S. policy of engagement with communist Cuba. He banned U.S. people-to-people travel to Cuba – and also cruise line travel, which last year carried an estimated 800,000 passengers to the island. It was just the latest rollback of the normalization of relations that Trump's predecessor, Barack Obama, began five years ago. And it raises the question: Does U.S. engagement with Cuba have a future anymore?