House Energy and Commerce Committee Chairman Fred Upton, R-Mich., has tasked four GOP members of his panel to take the lead on changing the Renewable Fuels Standard that determines the level of biofuels in the nation’s gasoline supply, National Journal Daily reported today.

The four members represent districts that crisscross the diverse industries with a stake in this complicated and contentious debate, including oil refineries, corn growers, livestock farmers, and biofuels producers, NJ Daily noted.

Rep. John Shimkus, R-Ill., a senior member of the committee whose state is No. 2 in corn production, will lead the unofficial GOP team. The other Republicans are Reps. Cory Gardner of Colorado, Lee Terry of Nebraska, and Steve Scalise of Louisiana.

Shimkus has spoken with Rep. Bruce Braley, D-Iowa, whose state produces the most corn in the country, NJ Daily said. Other Democrats reportedly eyed by Republicans as potential early supporters of the reform effort include Reps. Jim Matheson of Utah, Gene Green of Texas, and John Barrow of Georgia, considered the three most moderate Democrats on the committee.