 In an April 2008 Senate hearing chaired by U.S. Sen. Bernie Sanders ( I @-@ VT ) regarding farm conditions , Eric Schlosser , author of the best @-@ selling Fast Food Nation , commented on Burger King 's recalcitrance to sign an agreement with the CIW while Yum ! and McDonald 's had . Schlosser stated , " The admirable behavior of these two industry giants makes the behavior or Burger King ... seem completely unjustifiable . " 
