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.

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.

By holding down natural wage growth in labor-intensive industries, immigration serves as a subsidy for low-wage, low-productivity ways of doing business, retarding technological progress and productivity growth.

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.

And they are much more skeptical of the very idea of having immigration limits, whereas the public - again, independents and Democrats, as well as Republicans, although not necessarily all in the same proportions - have a much stronger sense of the American government and American law having responsibility to Americans specifically rather than to people around the world. So the polarization is up versus down, not really right versus left.

Well, because we're talking here about people who've been ordered deported and the administration has done nothing about actually making sure that they go home. This is theater, I think, for two audiences - one probably for the American public to some degree, to make it seem as though the administration is taking this renewed surge of Central Americans seriously.

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.