No election would be complete without at least one surprise winner who zooms in from left field to capture high office. This time that distinction belongs to Paul Wellstone, a political-science professor from Carleton College, who last week became the only challenger to oust an incumbent Senator. His victim, Republican Rudy Boschwitz of Minnesota, had seemed assured of a third term. "They just outhustled us," Boschwitz said by way of concession.
Well, yes, but that was only part of the upset's anatomy. Wellstone, 46, is a veteran political organizer for liberal causes. In 1983 he was arrested for trespassing while participating...