Now that the Senate has passed its immigration bill, the future of reform lies in the hands of the GOP-led House of Representatives, where the debate will center on allowing a path to citizenship for 11 million immigrants living in this country without legal status. Opponents of this path often claim that low-skilled Mexicans, who make up the largest subgroup, are not fitting into U.S. society _ that they don’t want to assimilate and are fated to remain a permanent underclass. Solid evidence suggests these claims are untrue.