Fox News host Bill O'Reilly said that his former boss, ex-Fox News CEO Roger Ailes, was the "best boss I ever had," even as he largely refrained from commenting on his departure in the wake of sexual harassment allegations.O'Reilly, appearing on NBC's "Today" show to promote his new book "Killing the Rising Sun," was asked by co-anchor Savannah Guthrie about Ailes' departure from the channel, and Gretchen Carlson's sexual harassment claims.“I don’t know anything about the case, nothing,” O’Reilly said.