As New York Senator Hillary Clinton spoke with a teacher's union group about her plan for universal preschool and health care, one teacher stood up to say she liked Clinton's haircut. “It is more Hillary Clinton than Dorothy Hammel,” said Kelly MacDonald, an English teacher at Manchester Central High School, to Clinton. That prompted Clinton to spend more time than she usually does joking about her changing hair styles. “There is so much fascination with my hair that I told Bill when he was president that if he wanted to get some international incident off the front page I would...