Will it be St. Albans, Sidwell Friends, or somewhere else entirely? We asked educational experts for their predictions. When President-elect Donald Trump and his family move to D.C.—Melania and Barron are planning to stay in New York City through the end of the school year—Barron Trump will be the first First Son since John F. Kennedy, Jr. to live there. And where he ends up in school is a big question. In 35 years, no First Kid has gone to a school other than Sidwell Friends, the private Quaker school where Sasha Obama is currently enrolled and from which both...