The effects of illegal immigration aren't that different from those of legal immigration —an illiterate Central American farmer with a green card is just as unsuited for a 21st-century economy as an illiterate Central American farmer without a green card.

Well, nobody's being deported - nobody - practically. And so what the people down there getting is the American government is telling us that you're not going to be able to stay. But, in fact, they're letting almost everybody stay. And so what they're trying to do is show that at least some people are going to get deported.

The interesting point is that the polarization is not so much among the public, although there's some of that. The polarization on the immigration issue is really between the elites and the public. In other words, this is not so much a right-left issue, which it is partly.

Well, enforcement theater is OK if it's reality theater. In other words, obviously, you want to make it clear, you want to make people see that the law is being enforced.

But it's more an up-versus-down issue because the research has shown that opinion leaders, whether they're elected officials, journalists, business leaders - it's academics, religious leaders - they have dramatically different views on immigration. A

But the other audience, I think, is people in Central America because since last summer, they've been running ads down there - the United States government has - don't come, it's dangerous. You will be immediately deported. That's literally what it says in Spanish.

Of 472 civilian occupations defined by the Department of Commerce, only six are majority immigrant (legal and illegal). These six occupations account for 1 percent of the total U.S. workforce. Many jobs often thought to be overwhelmingly done by immigrants are in fact majority native-born: 51 percent of maids are U.S.-born, as are 63 percent of butchers and meat processors, and 73 percent of janitors.