Even as Speaker Nancy Pelosi twisted arms for the final votes to pass her climate bill in June 2009, Democrats feared they might be "BTU'd." Many of them recalled how Al Gore had forced the House to vote in 1993 for an energy tax, a vote Democrats later blamed for helping their 1994 defeat. The politics isn't the same this time around. This time, it's much, much worse. Ask Rick Boucher, the coal-country Democrat who for nearly 30 years has represented southwest Virginia's ninth district. The 64-year-old is among the most powerful House Democrats, an incumbent who hasn't been seriously...