Washington Post: President Obama and his harshest critics business groups and Republicans have a shared interest in exaggerating the impact of the presidents proposal on climate change. By 2030, the proposal would reduce the electricity sectors greenhouse-gas emissions by 30 percent from a 2005 base . For Obama, its all about legacy. He wants to be the president who took bold action on the centurys great environmental challenge. For critics , its about demonstrating that costly mandates would hurt family...