President Trump has shown Cuba’s Communist rulers two ways their reign over the island can end: the Maduro way or the Khamenei way. The Cuban regime is a mix of gerontocracy, nepotism, and socialism — its official face is President Miguel Diaz-Canel, but supreme authority still emanates from the 94-year-old Raul Castro, brother of Fidel Castro, the state’s founding dictator. Though the long-lived Castro clan seems to prove only the good die young, no one beats the actuarial tables in the end,