President Obama is dishing out a much rockier transfer of power to Donald Trump than he received from his predecessor eight years ago, from accusing the president-elect of being aided by Russian hackers to first lady Michelle Obama’s complaint that the nation has lost hope. Despite pledging a “smooth and efficient” transition on the day after Mr. Trump’s victory, Mr. Obama has presided over an increasingly acrimonious war of words between the White House and the president-elect’s team. The awkward transfer of power stands in stark contrast to the cooperative atmosphere fostered by Republican George W. Bush’s White House in...