Sen. Mary Landrieu represents a state, Louisiana, that is home to two of the five largest oil refineries in the country. ExxonMobil's Baton Rouge refinery processes more than half a million barrels of oil per day. Landrieu's single largest campaign contributor is Entergy corporation, a large producer and distributor of electricity. The CEO of Entergy once said that the only viable solution to global warming is to burn more coal.
In 2008, Landrieu was added to the League of Conservation Voters "Dirty Dozen" list, an honor reserved for only the most environmentally backward legislator. Her lifetime LCV score of 43 percent is the culmination of a career spent voting for fossil fuel industry tax breaks and against measures to curb global warming-causing pollution. She's on record urging President Obama to stop making the fight against global warming a focus of the Democratic party.