I can't believe Kerry is selling this as a joke against Bush and some in the media are buying it. Today's hissyfit of a presser he had no trouble saying "President Bush", in 2004 no problems attacking Bush and using the words "President Bush", yet during this 'joke' he doesn't use the words "President Bush". Also look at the clip he isn't smiling or laughing or anything that shows it to be a joke. And, honestly whats the joke study hard and do well in school or you might become President of the United States?
The media knows exactly what he meant, they're just trying to help on the damage control for their party.