Responding to my immigration post this morning, my colleagues Dan Griswold and Jason Kuznicki have focused on the single short paragraph that touched on the substance of the matter. (The question before me, posed by Politico Arena, concerned mainly the political implications of the new Arizona law, given the latest Pew Research Center poll on the issue.) I quite agree with both that we’ve never had full control of our southern border (or any border, for that matter), but as Dan has noted elsewhere, when we had a guest-worker program in place, illegal immigration dropped by 95 percent – no small drop. And illegal, not legal, immigration is the issue before us. And Dan is right too that we’ve thrown a lot of enforcement at the problem in recent years, to limited avail, so it’s not true that Congress hasn’t done anything. What it has done, however, hasn’t addressed the real problem, the underlying substantive law, as Dan has often written.

I’m struck, though, by Jason’s unqualified comment that he can’t say he shares my views on immigration.” Really? I did say, I believe, that Congress needs to address the problem, including with a guest-worker program. And I also said that “It hardly needs saying that a welfare state, in the age of terrorism, cannot have open borders.” I can’t imagine anyone disagreeing with that.

Concerning both the welfare state and terrorism, Jason points to “remedies” at the far end of the problem. He writes, for example, that our welfare state is going broke anyway, and “compared to the damage being done by native-born U.S. citizens and their cursedly long lifespans, the immigrants’ overall effects are quite small.” (I won’t take that “cursedly long lifespan” point personally.) True, but in places where the welfare state issues are concentrated, like border-state emergency rooms and schools, that long-term national perspective isn’t the issue. Yes, getting the government out of health care and education might ameliorate those localized problems (that question’s for another day), but we can’t always wait for more remote problems to be solved before we address more immediate ones.

And that goes for Jason’s terrorism point, too. He writes: “Without the black market in drugs, we’d have a lot less to fear from terrorists, particularly on our southern border.” I’m all for legalizing recreational drugs. But I was alluding to Islamic terrorists, not narco-terrorists, when I spoke of getting control of our borders. Legalizing drugs (again, a more remote remedy) might have some effect on the coffers of Islamic terrorists, but it would hardly solve the terrorism problem. As long as that problem exists, we need border control. Let’s remember, for example, that it was an alert border agent who thwarted the would-be LAX bomber.