President Clinton signs the welfare reform law on Aug. 22, 1996. Stephen Jaffe /Reuters /Landov hide caption

itoggle caption Stephen Jaffe /Reuters /Landov

Republican vice presidential candidate Paul Ryan speaks Saturday in Florida. Gerardo Mora/Getty Images hide caption

itoggle caption Gerardo Mora/Getty Images

U.S. Republican vice presidential hopeful Paul Ryan greets supporters during a campaign rally in High Point, N.C., on Sunday. Saul Loeb/AFP/Getty Images hide caption

itoggle caption Saul Loeb/AFP/Getty Images