Donald Trump is adding a new figure to the list of people he considers a loser: longtime Hillary Clinton adviser Huma Abedin. During a Friday evening stop at a private picnic near Boston, the Republican White House hopeful and real estate mogul suggested that Abedin had shared classified information with her husband, disgraced ex-Rep. Anthony Weiner. Abedin, one of Clinton’s longest serving aides and now the vice chairman of her presidential campaign, was Clinton’s deputy chief of staff while she was Secretary of State and one of her most trusted advisers. Clinton spokesman Nick Merrill called Trump’s remarks “patently false,...