A group of 30 senators led by Senate Majority Whip Dick Durbin (D-IL), Senators Debbie Stabenow (DMI), Carl Levin (D-MI), Richard Blumenthal (D-CT), Dianne Feinstein (D-CA), Frank Lautenberg (D-NJ), Joe Lieberman (I-CT), and Olympia Snowe (R-ME) sent a letter February 17 to Environmental Protection Agency Administrator Lisa Jackson and Transportation Secretary Ray LaHood supporting the two agencies in their efforts to raise federal fuel economy standards to 54.5 miles per gallon by 2025. The agencies proposed rules in December that would establish more stringent CAFE and greenhouse gas emissions standards for model year 2017 through 2025 cars and light-duty trucks; the proposed rules would also set a CO2 emissions limit of 163 grams per mile by 2025, the equivalent of a fuel economy standard of 54.5 mpg if pollutant reductions were achieved via fuel-economy technology. The senators noted that some industry groups, including car manufacturers, have supported the proposal.