A bill unveiled by Sens. Al Franken, D-Minn., and Amy Klobuchar, D-Minn., that would require refineries to disclose their maintenance schedules to federal regulators earned the support of Sen. John Hoeven, R-N.D. Such reporting could help shield consumers from fuel price increases, Hoeven said. "Let's see some transparency. Let's see some more competition," Hoeven said.