John Edwards came downstairs and found 5-year-old son Jack on the floor, arranging toy trucks in a column. "What are you doing?" the former North Carolina senator asked. "Making a motorcade," came the exuberant reply. A year after Democrats John Kerry and Edwards lost the White House election, young Jack still may think about the heady days of last fall. His father, however, has moved on — without a Secret Service escort. _He is traveling the country, trying to rally college students to the cause of fighting poverty in the U.S. _He is presiding over a new poverty center at...