WASHINGTON – Sen. Chuck Grassley, a senior member of the Senate Agriculture Committee, today led a bipartisan group of senators, including Sens. Joni Ernst (R-Iowa), Deb Fischer (R-Neb.), Joe Donnelly (D-Ind.), Tammy Duckworth (D-Ill.), Al Franken (D-Minn.), Amy Klobuchar (D-Minn.), Debbie Stabenow (D-Mich.), Ben Sasse (R-Neb.) and Dick Durbin (D-Ill.), urging U.S.