A Wisconsin school district has been thrown into turmoil after its superintendent called his jurisdiction “lily” white and a district principal a “bitch” on a hot mic recording. Dr. Claude Tiller Jr. resigned from his position as Green Bay schools chief after a controversial appearance on an Atlanta radio show that rankled local board members and others in the community. During a break in a radio program that airs on WAOK, Tiller was heard referring to a district principal as a “witch” and a “bitch” on the show’s still-broadcasting webcam and asserting the white woman was unfairly targeting a student...