The legal battle over SB 1070 is far from over, so neither side should cheer or despair. The upshot of the Ninth Circuit’s splintered and highly technical opinion is merely that the district court did not abuse its discretion in enjoining four provisions. The court could not and did not rule on the legislation’s ultimate constitutionality and, of course, SB 1070’s remaining provisions—the ten that weren’t challenged and the two on which Judge Bolton rejected the government’s argument—remain in effect.

But the legal machinations are only half the story. While I personally think that all or almost all of the Arizona law is constitutional, at least as written (abuses in application are always possible), it’s bad policy because it harms the state’s economy and misallocates law enforcement resources. But I also understand the frustration of many state governments, whose citizens are demanding relief from a broken immigration system that Congress has repeatedly failed to fix. Whether it’s stronger enforcement (Arizona) or liberalizing work permits (Utah), states should not be forced into the position of having to enact their own piecemeal immigration solutions while living within a system where the regulation of immigration is a federal responsibility. Congress has dropped the ball in not passing comprehensive immigration reform, despite facing a system that doesn’t work for anyone: not big business or small business, not rich Americans or poor ones, not skilled would-be immigrants or unskilled.

The federalism our Constitution establishes sometimes demands that the federal government act on certain issues. This is such a time and immigration is such an issue.