I haven't posted anything about it until now because illegal immigration is not a hot-button issue of mine. I favor greatly-expanded legal immigration from Mexico and other Latin American countries, and support an amnesty program that would allow current illegal residents to obtain citizenship. In general, I think the vast majority of illegal immigrants benefit the U.S. and our economy. But having said all that, I don't have a major problem with the Arizona law -- if I understand it correctly.
Border states such as Arizona do have serious problems caused by illegal immigration. The federal government has failed to control the border, and the states have to act on their own. Although I am inherently suspicious of any increase in police powers, it appears that the Arizona law merely allows/requires police to enforce existing immigration law, although certain specific provisions might not stand up under court scrutiny. I see nothing to warrant the hysterical, borderline crazy overreaction by the usual suspects. Byron York, writing in the Washington Examiner, does a good job debunking some of the apparently misinformed criticism.