As Ralph Nader prepares for another spoiler run at the presidency, liberals are again wringing their hands at the damage he may do not only to Democrats' chances of retaking the White House but to his own reputation as well. "The most regrettable thing about Mr. Nader's new candidacy is not how it is likely to affect the election, but how it will affect Mr. Nader's own legacy," editorialized The New York Times this week. "Ralph Nader has been one of the giants of the American reform movement. ... [I]t would be a tragedy if Mr. Nader allowed [his anger]...