In the final weeks of his presidency, Barack Obama downplayed the idea that he would criticize his successor from the sidelines. Noting his appreciation for the way George W. Bush stayed silent during his own presidency, Obama said he would try to extend the same courtesy to Donald Trump. He made it exactly 10 days before giving in to the irresistible impulse to jump back into the fray. After protests erupted as a result of President Trump’s executive order on immigration, Obama released a statement through spokesman Kevin Lewis: “President Obama is heartened by the level of engagement taking place...