When he came before the Senate Appropriations Committee’s Financial Services and General Government Subcommittee on May 14, Federal Trade Commission Chairman William E. Kovacic told the chairman, Richard J. Durbin (D-Ill.), exactly what he wanted to hear.Noting that diesel fuel historically has been less expensive than gasoline at the retail level in an Apr. 23 letter to Kovacic, the senator said that the Energy Information Administration reported that week that diesel reached a record $4.14/gal national average compared to $3.51/gal for gasoline. “The growing price gap has never been wider,” he said.Two days before the hearing, EIA reported that diesel cost an average $...