What makes Ralph run? The question was asked in anguish by Ralph Nader's friends and former colleagues and in anger by Al Gore's followers during the last presidential campaign, when Mr Nader's bid to become America's first Green president split the Democratic vote. The harshest answer―ego―seems, on its own, to be an unlikely explanation. "If you want to be effective in Washington, put your own ego aside," the veteran consumer activist once told a colleague.
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