Leaders in the biofuels industry wrote President Donald Trump on Friday after learning Sen. Ted Cruz, R-Texas, had floated a proposal to the White House that would essentially cap prices for renewable identification number (RIN) credits at 10 cents apiece. The proposal from the Texas senator, negotiating on behalf of oil refiners, spurred major players in both biofuels and commodity crops industries to send a letter Friday to President Donald Trump detailing why the RIN market exists, how it is operated by EPA, and some of the problems EPA has in providing transparency on RIN trading.Most importantly, the letter praised President Trump for his support of the biofuels industry and reiterated the need to ensure any policy changes don't undercut billions of dollars in biofuels infrastructure that has been put in place since the Renewable Fuel Standard was created.