DAVID GERGEN has been a well-known and respected commentator, author and adviser to presidents for thirty years. He served as director of communications for President Reagan and held positions in the administrations of Presidents Nixon, Ford, and Clinton. He currently teaches at the John F. Kennedy School of Government at Harvard University and is editor-at-large at U.S. News & World Report. In the fall of 2000 he published the best-selling Eyewitness to Power: The Essence of Leadership, Nixon to Clinton. Gergen is also a political commentator for CNN.