Politico: Ask 15 Republicans about climate change, and you’ll get 20 different answers. In March, Republican National Committee Chairman Michael Steele told a national conservative radio program that the Earth is “cooling,’ not warming. Last week, Alaska Gov. Sarah Palin said global warming iss real and hurting her state, acknowledging that “many believe’ an international effort to reduce greenhouse gases is necessary. And on Sunday, Republican leader John Boehner dismissed as …