President Donald Trump said Thursday that he’s putting Secretary of State Marco Rubio in charge of the U.S. bid to bring the 2035 World Expo to Miami, stacking a new assignment onto the former Florida senator’s already-high-profile role running America’s top diplomatic shop. Trump said Florida wants the Expo and that he backs Miami as the host city, according to an Associated Press report that cited his social media post. “The Great State of Florida has expressed strong interest in hosting the Expo in Miami, which I fully support,” Trump wrote. “Miami Expo 2035 can be the next big milestone...