For Christmas, nearly a dozen readers sent me the same gift, an article about goings on in the Southwest: "Illegal immigrants packing up and leaving Arizona." According to the article, illegal immigrants are fleeing the Grand Canyon State because of an "oppressive environment" and the fear that the undocumented won't be able to find work after this week, when a tough employer-sanctions law takes effect. It's a restrictionist dream come true. Many of those who say they've had a bellyful of illegal immigration claim that, if we dried up the jobs, illegal immigrants would simply "self-deport." I've written that this...