From KCRG (Iowa):

Four democratic presidential hopefuls made the trip to Mount Pleasant, including progressive democrat and former Vermont Governor Howard Dean, Florida Senator Bob Graham, Congressman Dennis Kucinich from Ohio, and former Vice Presidential candidate Joe Lieberman ...

... There were also representatives on hand for today's event, they included representatives for Dick Gephardt, John Edwards, and John Kerry.

Reverend Al Sharpton was scheduled to be at the event, was a no-show.