A Hillary Clinton presidency would have been even more disruptive that the current Donald Trump administration, historian and prolific author Niall Ferguson told CNBC on Thursday. "There would have been an almost immediate impeachment process," Ferguson said in an interview with CNBC's Steve Sedgwick at the Ambrosetti Forum in Italy on Thursday. "More importantly, Trump supporters would have bought the story that the election had been rigged and you would have had Trump supporters with their pitchforks, or more likely semi-automatics, in a very ugly mood," he added. An anonymous op-ed published by The New York Times on Wednesday painted...