SAN JUAN — As Puerto Rico slips deeper into what many call a humanitarian crisis following Hurricane Maria, the island is primed for a mass exodus of what could be 1 million people — a sizable number of whom are expected to settle in Florida, the nation's biggest swing state. That could well prove to be a boon to Democrats in a state which the past four top-of-the-ticket races have been decided by about a percentage point. "It’s going to mean a lot more people voting Democrat in Florida," Marco Rigau, president of the San Juan municipal assembly, told POLITICO...