In a National Review piece, Kris W. Kobach, one of the drafters of the Arizona law, offers a series of defenses of the statute that seem quite strong to me, among them this:
The U.S. Supreme Court has long recognized that states can enact statutes to discourage illegal immigration without being preempted by federal law. In the landmark 1976 case of De Canas v. Bica, the Supreme Court upheld a California law that prohibited employers from knowingly hiring unauthorized aliens. The Court rejected preemption arguments, since “respondents . . . fail to point out, and an independent review does not reveal, any specific indication in either the wording or the legislative history of the [Immigration and Nationality Act] that Congress intended to preclude . . . state regulation touching on aliens in general.” States and cities can enact laws discouraging illegal immigration, and can assist the federal government in enforcing federal immigration laws in other ways, as long as their actions don’t conflict with federal law.
In the case of S.B. 1070 [the Arizona statute in question], the ACLU will be hard-pressed to find any such conflict. Indeed, S.B. 1070 is a mirror image of federal law. The documentation provisions of the Arizona law penalize precisely the same conduct that is already penalized under federal immigration law…Because S.B. 1070 matches federal law so precisely, it is protected by the legal doctrine of “concurrent enforcement.
Kobach goes on to describe a host of other relevant cases in which states were held to be able to regulate and enforce immigration law that does not actively conflict with federal law, all of which appear to apply to the statute currently under attack. The leading argument against it appears to be this, which seems patently absurd to me as a reason to declare a law unconstitutional:
The only argument…left is the dubious claim that more vigorous enforcement of federal immigration laws in Arizona will conflict with federal purposes, perhaps by compelling LESC personnel to respond to a much larger number of calls from Arizona. But the U.S. District Court for Arizona already rejected that line of thinking in Arizona Contractors Association v. Napolitano (2007), evaluating Arizona’s 2007 law that required all employers to use the E-Verify system to verify the work authorization of employees. According to the court, “the fact that the Act will result in additional inquiries to the federal government is consistent with federal law.” (In that case, Janet Napolitano, as governor of Arizona, defended the law; now, as homeland-security secretary, she opposes S.B. 1070.)
In summary, we’ve heard all these arguments before. Many of the people and organizations that are now declaring S.B. 1070 to be unconstitutional made the same claims regarding previous Arizona statutes: Arizona’s last three major laws concerning illegal immigration were all challenged in court ”” Proposition 200 in 2004, the Human Smuggling Act in 2005, and the Legal Arizona Workers Act in 2007…In every case, the Arizona law in question was sustained.
Ironies abound, do they not? When the political shoe is on the other foot, what was defended before is attacked now, and vice versa.
There is no use pretending that politics do not influence courts’ decisions, and so if the arguments the federal government is making at present were rejected by courts in the past, it does not mean decisions won’t go differently now.



