Nhat V. Meyer / Mercury News
U.S. Senator Barack Obama gives a speech at the Saint Francis Hotel in San Francisco.
U.S. Senator Barack Obama gives a speech at the Saint Francis Hotel in San Francisco.
Presidential candidate Barack Obama , D-Ill., kisses Sen. Barbara Boxer, D-Calif., during her re-election campaign reception in San Francisco, Monday, Feb. 19, 2007. (AP Photo/Paul Sakuma)