The Obama administration’s EPA rules mark a sea change on sea-level rise: global warming is a real mid-term issue, and it could be a political plus for Democrats between now and 2016
Live updates: Obama’s climate change emissions rules, unveiled
The last time Congress made a serious effort on climate change, Joe Manchin campaigned for a Senate seat in West Virginia by shooting a rifle at a cap-and-trade bill. And Manchin, who won, is a Democrat.
Four years on, Republican candidates who deny the existence of climate change may be shooting themselves in the foot and Democrats might even be able to say the words "global warming" out loud on the campaign trail between now and November.