These are sectors where workers are often vulnerable to exploitation by small businessmen, many of them fellow immigrants. In such jobs, wages are meager and benefits are often non-existent. So it's not surprising that, as of 2008, three-fifths of undocumented adults lacked health insurance, compared to 24% of legal-immigrant adults and 14% of native-born adults. Yet it is too easy to overlook the corollary of this statistic: that two-fifths, or 40%, of illegals do have health insurance. "Life in the shadows" is not uniformly dark.
Under the Constitution, the federal government was assigned specific limited powers, and most government functions were left to the states. To ensure that people understood the limits on federal power, the Framers added the Constitution's Tenth Amendment: "The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people." The amendment embodies federalism, the idea that federal and state governments have separate areas of activity and that federal responsibilities are "few and defined," as James Madison noted.