Religious piety — especially of the Christian variety? More illegal immigrants identify as Christian (83 percent) than do Americans (70.6 percent), a fact right-wing immigration restrictionists might ponder as they bemoan declines in church attendance.

Business creation? Nonimmigrants start businesses at half the rate of immigrants, and accounted for fewer than half the companies started in Silicon Valley between 1995 and 2005. Overall, the share of nonimmigrant entrepreneurs fell by more than 10 percentage points between 1995 and 2008, according to a Harvard Business Review study.

Nor does the case against nonimmigrants end there. The rate of out-of-wedlock births for United States-born mothers exceeds the rate for foreign-born moms, 42 percent to 33 percent. The rate of delinquency and criminality among nonimmigrant teens considerably exceeds that of their immigrant peers. A recent report by the Sentencing Project also finds evidence that the fewer immigrants there are in a neighborhood, the likelier it is to be unsafe.