Finishing third in a contest that just a few weeks earlier he had been expected to win handily is surely a setback for the campaign of Howard Dean. But in the long run, Dean's Iowa concession speech, in which he appeared to lose control of himself and began screaming at supporters — all in front of dozens of television cameras — may be even more damaging. Dean's speech, delivered at his headquarters in Des Moines, stunned even some observers used to his displays of anger on the campaign trail. And in the days after the caucuses it is sure to...