ANNAPOLIS -- President Bush yesterday urged Naval Academy graduates to challenge the status quo in the same way he is challenging congressional Democrats to enact his conservative agenda. "This advice comes with a warning: If you challenge established ways of thinking, you will face opposition," Mr. Bush said in his commencement speech at Navy-Marine Corps Memorial Stadium. "Believe me, I know -- I've lived in Washington for four years. "The opponents of change are many, and its champions are few, but the champions of change are the ones who make history. Pursue the possibilities others tell you do not exist."...