Weekly Standard 
Sept 3, 2012
Former President Bill Clinton tried to get former senator Ted Kennedy to endorse Hillary Clinton for president in the 2008 election by describing Barack Obama this way: “A few years ago, this guy would have been carrying our bags.”
This anecdote is revealed in a New Yorker  article on the relationship between Bill Clinton and Obama:
Tim Russert told me that, according to his sources, Bill Clinton, in an effort to secure an endorsement for Hillary from Ted Kennedy, said to Kennedy, “A few years ago, this guy would have been carrying our bags.”
Clinton is giving a keynote address at the Democratic convention this week in Charlotte, North Carolina.