Last modified: Saturday, April 15, 2006 11:48 PM EDT Journalist to speak at Wheaton graduation BY REBECCA KEISTER/SUN CHRONICLE STAFF NORTON -- Award-winning journalist and best-selling author Cokie Roberts will address the Class of 2006 at Wheaton College's commencement next month. Roberts, a senior news analyst at National Public Radio, political commentator for ABC News and an on-air analyst for that network, will speak to graduates on Saturday, May 20. Ceremonies will begin at 10 a.m. She will be joined by Kathleen M. Dennehy, commissioner of the Massachusetts Department of Correction and a member of Wheaton's Class of 1976, and others. In her 40-plus year career in journalism, Roberts has won several awards including the Edward R. Murrow Award - the highest honor in public radio. With her husband, Steven V. Roberts, she writes a weekly syndicated column that is run in major newspapers throughout the country. Her op-ed columns have appeared in the New York Times and The Washington Post. She also has written for the New York Times Magazine, USA Weekend Magazine and The Atlantic. Her best-selling books include `` From This Day Forward,'' an account of her 30-plus year marriage and other marriages in American History, and `` We Are Our Mother's Daughters.'' Roberts hold a bachelor degree in political science from Wellesley College and received that school's Distinguished Alumnae Award in 1985. She has received more than 15 honorary degrees.