Campaigning can exhaust the healthiest candidates. Joe's no exception. It's pretty hard to cherry-pick “Joe Biden's just crazy-tired moments,” so we'll settle for the most awkward ever, which may have been the Missouri campaign event in 2008, when Biden introduced a politician named Chuck Graham by saying, "Senator Chuck Graham is here! Stand up, Chuck! Let 'em see ya!"—only to realize a second later that Senator Graham is a paraplegic.