By Katharine Seelye Source: The New York Times In the early 1970s, Karen Ferguson was a Nader Raider, one of a legion of young public-interest lawyers who flocked to Washington to work for Ralph Nader, the consumer advocate and scourge of corporate America. Mr. Nader would periodically gather the Raiders in a circle and read off a list of topics or little-examined government agencies to be investigated; the lawyers were to raise their hand when a subject piqued their [...]