The head of a pharmaceutical company, who partnered with the Clinton Foundation, has increased the price of an auto-injector used to treat opioid overdoses by 680 percent over the course of three years.Spencer Williamson, the president and chief executive officer of the Richmond, Virginia-based Kaleo Pharmaceuticals, is under fire after the price of a two-pack of Evzio, a device that treats life-threatening opioid overdoses, skyrocketed from $690 in 2014 to $4,500 today.Thirty-one Democratic senators are now demanding answers on the price hike."We are deeply concerned about reports that Kaleo dramatically increased the cost of its naloxone injector device, Evzio, an...