President Donald Trump and Secretary of State Marco Rubio have made clear that the collapse of Cuba’s communist government is not only a likely side benefit of Maduro’s ouster but a goal.No place was hit harder than Cuba by the shock waves that Saturday morning’s U.S. military seizure of Venezuela’s Nicolás Maduro sent throughout Latin America and the world. Within hours of the operation — long before the government in Havana acknowledged it — phone calls and texts across the island spread the news that dozens of elite Cuban security forces had been killed guarding Maduro. But by the time...