Harris Llewellyn Wofford (born April 9, 1926) served as a Democratic U.S. Senator from Pennsylvania from 1991 to 1995 and as the fifth president of Bryn Mawr College, and is a noted advocate of national service and volunteering. Wofford was a surrogate for Barack Obama's campaign for president, and introduced Obama in Philadelphia at the National Constitution Center before Obama's speech on race in America, "A More Perfect Union."