Republican legislative leaders continue to oppose a statewide mandate thatethanol be the only fuel sold at Iowa gas stations. Secretary ofAgriculture Patty Judge awaits legal advice as to whether she has theauthority to establish an “ethanol-only” rule in Iowa. Senate RepublicanLeader Stewart Iverson of Dows opposes the move.Iverson says America’s economy runs on free-market principles, and mandatingethanol use violates the basic idea of competition among products.