Will Wilkinson makes a case against birthright citizenship in the United States, in The Week:
Even as Arizona continues to distinguish itself as America's undisputed leader in hare-brained xenophobia, the state has stumbled upon a very good idea. Hot on the heels of SB 1070, the controversial Arizona law that hands cops expansive powers to detain anybody who gives off an insufficiently American vibe, Republican lawmakers in the state have set their sights on a new state law to deny citizenship to babies born on American soil whose parents lack proper papers.
Currently, anyone born within U.S. boundaries counts as a U.S. citizen, and it doesn’t matter a bit how mom got in. The proposal to end “birthright citizenship” for the children of unauthorized immigrants springs from less than generous motives, and almost surely runs afoul of the U.S. Constitution. But ending it altogether is a better idea than you might think. (And if you already think it's a good idea, it's good for reasons you might find surprising.) For one, it would likely achieve the opposite of its intended result by making America more, rather than less, welcoming to newcomers.