The integrity of the United States Census may be at risk. That’s certainly what some Republicans are concerned about in the Obama era. For years, liberals have rightly pointed out that the decennial census undercounts certain groups — minorities, illegal immigrants, transients. An internal Census Bureau analysis from 2003 also determined that the last census overcounted whites and Asians. The liberals’ solution? Statistical sampling, in which census workers would study closely the populations of selected sample areas and use the resulting numbers to correct the numbers obtained by direct enumeration. Statistical sampling was a hot political issue in the late...