Despite that bravado, Democratic leaders made it clear they have no plans to bring a climate bill to the Senate floor this year. Indeed, the issue is so politically charged that a host of Democrats who face tough re-election fights in the fall opted to skip the session. Sens. Mary Landrieu of Louisiana, Mark Pryor of Arkansas, Mark Begich of Alaska and Kay Hagan of North Carolina were among Democrats who stayed away.
Sen. James Inhofe, R-Okla., said Democrats who showed up were not convincing anyone with their stunt.
"They'll have an audience of themselves, so I hope they enjoy it," Inhofe said about an hour into the marathon, planned to last for nearly 15 hours. Inhofe's speech marked the only time Republicans engaged in the debate. Two other GOP senators, Alabama's Jeff Sessions and McConnell denounced Democrats before the overnight session began.
McConnell suggested the Democratic motivation was campaign money — Tom Steyer's money.
"It's cruel to tell struggling coal families that they can't have a job because some billionaire from San Francisco disagrees with their line of work," McConnell said. He was referring to Steyer, a former hedge-fund manager and environmentalist who says he will spend $100 million — $50 million of his own money and $50 million from other donors — to make climate change a top-tier issue in the 2014 elections.
Leading off, Senate Majority Leader Harry Reid, D-Nev., called climate change "a question of our own survival" and said the United States and other countries have a responsibility to act "before it is too late."
House Democrats pushed through a bill to limit greenhouse gas emissions blamed for global warming in 2009, then lost their majority the following election. A climate bill led by then-Massachusetts Sen. John Kerry collapsed in 2010 without a vote in the Democratic-controlled Senate.