ASHEVILLE, N.C. (BP)--When Mongan Nyman and her classmates exchanged Halloween candy in October 2000, Morgan's included messages like "Costumes are cool but heaven is awesome!" But Robert Davidovich, principal of Cushing Elementary School in Delafield, Wis., said the second-grader's holiday messages violated the separation of church and state. Then he made Morgan go to each classmate and take the candy back. That afternoon, she got off the school bus crying, her mother said. She cried all night, too, once becoming so upset she threw up. Three months later came Valentine's Day, and Mr. Davidovich refused to let Morgan pass out...