Obama and Clinton's Rocky Relationship

intro: Bill Clinton is one of the Democrats' best spokespeople. He's grown more popular as a former president, particularly among the party faithful. He can make complicated policy arguments relatable to ordinary people. And he's one of the best speakers in American politics. Watch our ABC News/Yahoo News Convention Show LIVE tonight, 7-11:30 PM HERE There's no wonder he has a primetime speaking role at the Democratic convention in Charlotte. But his relationship with Barack Obama, the...Full Story