Congress is set to consider reauthorizing the changes enacted in 1996 to the nation's welfare laws. But critics are questioning the effectiveness of those revisions at keeping immigrants off of public assistance rolls. The Personal Responsibility and Work Opportunity Reconciliation Act (PRWORA) of 1996 had two major effects on immigrants to the United States. First, most non-citizens who entered the U.S. before August 22, 1996, were to be removed from Supplemental Security Income (SSI) and food stamp programs within one year. But critics say this provision has never been fully enforced. And second, immigrants who arrived in the country on...