Momentum in Climate Change Battle Shifting
http://dailycaller.com/2014/12/12/poll-half-of-republicans-support-climate-regulations/
Interestingly, despite Mitch McConnel's stated opposition to the currently proposed regulations, it seems that his base may not be as gungho as he thinks about stymieing climate change regulation. A recent poll conducted by Yale suggests that more than half of all Republicans and Right Leaning independents believe that regulation is needed to address global warming. (The same article however casts doubt on how many republicans actually believe in Anthropogenic Global Warming)
Of course the poll, like all polls, is far from definitive, but it does give one food for thought. That Republicans still aren't too concerned about Global Warming, yet are coming around to supporting (or at least not opposing) carbon dioxide regulations suggests that this might be a battle that the Republican Party Base might be giving up on.
My belief is that with the economy improving, the idea of regulating industry is becoming less terrifying to a lot of more moderate Republicans.