GEORGETOWN, S.C. -- Joe Gamble climbs into his black Chevy pickup and leaves the auto glass repair shop, where he spent 20 fruitless minutes trying to persuade workers to vote for Howard Dean. Like many of the 600 steelworkers laid off in October in this small town south of Myrtle Beach, Gamble, 49, is convinced foreign trade cost him his job. But even here, where the jobless rate is among the state's highest at nearly 15 percent, converting that outrage into political power is proving to be a tough task. Neither of the two workers at the glass-repair shop last...