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NY Times

As Democrats strained to win over crucial holdouts on the way to narrow, party-line approval of global warming legislation, they were dogged by a critical question: Has the political climate changed since 1993? Veteran members of both parties vividly remember when many House Democrats, in the early months of the Clinton administration, reluctantly backed a proposed B.T.U. tax — a new levy on each unit of energy consumed — only to see it ignored by the Senate and seized as a campaign issue by Republicans, who took control of the House the next year.

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