Students who complete degree requirements during the summer sessions and the fall semester are invited to participate in the December commencement exercise, while students who complete degree requirements in the spring are invited to participate in the May commencement services.[95] Notable speakers include Dr. Mary Elizabeth Carnegie,[96] distinguished educator and champion for the preservation of the history of African-American nurses; Frank Porter Graham,[97] Former president of the University of North Carolina at Chapel Hill and senator; Donna Brazile,[98] political analyst and Vice Chairwoman of the Democratic National Committee; and First Lady of the United States, Michelle Obama.[99]