IMO, by far the best of the lot. He seems to have energy, enthusiasm, a sense of personal responsibility, optimism and strongly held beliefs. Not sure that translates to the Kerry-Edwards ticket, but good call FIK... he's likely one to keep an eye on for the future.
As one who rarely votes for Democrats, my advice to Democrats is put him forward as the face of your party for the future.
As one who rarely votes for Democrats, my advice to Democrats is put him forward as the face of your party for the future.