That illegal immigrants living in the United States place an economic burden on schools, hospitals, prisons and other public services is undeniable, but it's also true that they contribute to our economy and our society in myriad ways. Bullying them into leaving is counterproductive and downright mean. It's also shortsighted. Many immigrant families are blended, made up of legal immigrants, illegal ones and U.S.-born citizens. Harsh laws and deportations may satisfy the popular hunger for instantaneous immigration reform, but the result will be a legacy of anguish and resentment among millions of people who aren't going anywhere.

Border enforcement sounds nice, but we've shown no capacity to effectively shut down the Mexican-American border, and the sort of domestic militarization an actual fence would signal is, to say the least, unsettling. Corporate enforcement is important, but ID fraud foils much of it, and the taller our fence and the more stringent our corporate crackdowns, the more sophisticated Mexican document forgery will become, which brings problems all its own, particularly if you fear terrorism.

Trying to stop the flow of immigrants when they reach our border is, in sum, a fool's game. The question is whether you stop some immigrants before they leave home.