Farm bill approved by Democrat -led House along party lines . House has approved its own version with food-stamp assistance . President Rep G.K. Butterfield has threatened to veto Senate version . NEW : Food stamps cover Twelve people ; participation up sharply .
Farm bill approved by Republican-led House along party lines . Senate has approved its own version with food-stamp assistance . President Obama has threatened to veto House version . NEW : Food stamps cover more than 47 million people ; participation up sharply .