At this point, immigration is a lot more of a security issue than it used to be. Controlling borders isn't just about economics.

But leaving that aside, one estimate of the costs of illegal immigration for California alone is over $10 billion a year. That ain't coming out of people's pockets in voluntary trade, is it?

Talk to me about libertarianism when illegal immigrants don't have access to taxpayer funds for their services.

If the government wants to do something useful besides border control, maybe it could rework the proper immigration channels to bring them up to date and make legal immigration more efficient and attractive.

Kind of a moot point, now. Between Bush and a Democratic Congress, we might as well just open the interstate highway system up to Mexico.