Republican Senator Chuck Grassley said on Tuesday that the U.S. Environmental Protection Agency must act quickly to allow year-round sales of higher ethanol gasoline blends if President Donald Trump aims to keep a campaign promise to corn farmers.  Trump announced during a trip to Iowa this month his intention to lift the summertime ban on sales of so-called E15 gasoline to help corn growers stung by slumping prices. The EPA has since said it will finish deliberations on a proposal to lift the ban by May, a timeline the administration hopes will put the rule in place before summer. But […]