Congressman Jim Sensenbrenner (R-WI) introduced H.R. 875, which would require the EPA to stop the use of gasoline containing 15 percent ethanol (E15) until its harmful effects are investigated further. 

H.R. 875 (text here) would repeal the EPA’s waiver decision approving the use of E15 and the authority of the agency to grant further decisions until the EPA seeks an independent scientific analysis of the effects of the E15 blend.
“There have been several tests and warnings highlighting E15’s harmful effects on engines and their components, but they have all been dismissed by the EPA.  Therefore, we must force the EPA to stop the use of E15 fuel until the serious safety, durability, performance and environmental concerns have been addressed. Throughout the 112th Congress, I introduced several bills to address the risks associated with E15. And earlier this week, witnesses from AAA, the American Motorcycle Association, and the Coordinating Research Council all testified to the Science, Space and Technology Committee that more testing is needed. We have a responsibility to ensure that Americans using gas-powered machinery – whether it be cars and boats or chainsaws and lawnmowers – are not put at risk due to faulty fuel that has not been adequately vetted.”