** FILE ** In this Aug. 9, 1972 black-and-white file photo, with the pictures of former Democratic Presidents Kennedy and Johnson behind him, Sen. George McGovern, D-S.D., introduces Sargent Shriver as his new vice presidential running mate to the Democratic National Committee in Washington. For all its spectacle and optimism, the Democratic convention is haunted. Ghosts of elections past are walking the Pepsi Center's corridors this week, greeting old friends, even holding a luncheon. Years ago they won the prize that Barack Obama will claim on Thursday. But their names and deeds are dusty artifacts to young Americans, and to many older voters, they conjure up campaign debacles that helped Republicans paint the Democratic Party as too liberal, wimpy and egg-headed. (AP Photo, File)