Charles Krauthammer, the beloved and brilliant Fox News Channel personality who gave up a pioneering career in psychiatry to become a Pulitzer Prize-winning political analyst, on Friday revealed the heartbreaking news that he is in the final stages of a losing battle with cancer. The 68-year-old’s incisive takes on politics of the day have been missing from Fox News Channel’s “Special Report” for nearly a year as he battled an abdominal tumor and subsequent complications, but colleagues and viewers alike had held out hope that he would return to the evening show he helped establish as must-viewing. But in an...