EXCLUSIVE: Amid the tumult of the 2016 presidential campaign, John Podesta is best known as Hillary Clinton’s campaign chairman and the individual from whose private account WikiLeaks is presently publishing some 50,000 hacked emails. Released in daily batches, these documents have laid bare the inner workings and tensions of the Clinton campaign in an unprecedented way, while also offering insights into the operations of the Clinton Foundation and the State Department in the years when Clinton, now the Democratic presidential nominee, served as secretary of state. At that time, when Clinton was traveling to a record number of foreign countries,...