Thomas Donohue (L), president and CEO of the U.S. Chamber of Commerce, and Luis de la Calle, managing director and founding partner of De la Calle, Madrazo, Mancera, S.C., participate in the NAFTA Under Assault: Reassessing Its Impact panel at the 2008 Milken Institute Global Conference in Beverly Hills, California on April 29, 2008. (UPI Photo/Jim Ruymen)