Sen. Chuck Grassley (R-IA) introduced S. 818, which would prohibit a packer from owning, feeding or controlling livestock for slaughter. Grassley introduced similar legislation in the last Congress. Other co-sponsors include Sens. Mark Dayton (D-MN), Byron Dorgan (D-ND), Mike Enzi (R-WY), Tom Harkin (D-IA), Tim Johnson (D-SD), Ken Salazar (D-CO), and John Thune (R-SD).