For years, the Washington press corps routinely referred to Biden as "The Dumbest Man In The Senate".Well, they can't exactly call him the Dumbest Man in the Senate anymore, can they?
Since Biden was nominated for VP, you have yet to hear them use that expression.
Recall that Algore didn't light up the IQ meter, either.
I always believed that Clinton's reason for selecting the enviro-dolt was that he was sufficiently dumb, and sufficiently loyal -- kinda like a puppy -- that he wouldn't have the presence of mind to figure out that Bill & Hillary were looting the country.