What becomes of Cuba? This enduring and already freighted question has acquired dizzying new dimensions in the aftermath of the U.S. military operation that extracted Venezuelan President Nicolás Maduro. The anxiety and uncertainty surrounding Cuba’s future have intensified further since U.S. President Donald Trump signed an executive order on Feb. 29 pledging to impose punishing additional tariffs upon any country that supplies the island with the oil that Venezuela, its primary economic supporter, can no longer furnish.