Bill Moyers: If you wonder why so many members of Congress are in denial when it comes to climate change, follow the money. This week, Forecast the Facts and SumOfUs, two grassroots groups working to sway public opinion about global warming, took a step toward holding legislators accountable with the release of a new report exposing the companies that since 2008, according to FEC data compiled by the Center for Responsive Politics, have bankrolled the Climate Denier Caucus to the tune of $641 million in campaign...