They held out things for him to sign: Political fliers. Books. A baseball. Yankees hats. NYPD hats. FDNY hats. A girl's crayon drawing of an American flag on looseleaf paper. One woman even held out her checkbook.They told him they loved him and wanted to vote for him and couldn't wait to see him in the White House.They snapped him with their digital cameras and camera phones, shoving their children into the frame.Moving through the aisles of the store on West Charleston Boulevard, Giuliani alternated a mock-serious survey of store shelves with posing for pictures, his rabbity, dimpled smile frozen...