Arizona law: “Yesterday’s argument in Arizona v. United States (my preview here), which in a non-Obamacare world would be the case of the decade, revealed among other things yet another bizarre legal position taken by the Obama Justice Department.  That is, the solicitor general stood there and straight-facedly made the claims that: (1) local law enforcement could make ”ad hoc” judgments to apprehend illegal aliens but state governments (the bosses of said local officials) could not “systematize” such policies by legislation; and (2) state laws like Arizona’s were unconstitutional because they interfere with federal policy decisions on how to allocate enforcement resources,” writes Cato’s Ilya Shapiro. (Cato)

The U.S. illegal immigration problem is diminishing, says AEI’s Michael Barone: “Pew’s demographers have carefully combed through statistics compiled by the U.S. Census Bureau, the Department of Homeland Security, and the Mexican government, and have come up with estimates of the flow of migrants from and back to Mexico. Their work seems to be as close to definitive as possible. They conclude that from 2005 to 2010, some 1.39 million people came from Mexico to the United States and 1.37 million went from the U.S. to Mexico. ‘The largest wave of immigration in history from a single country to the United States,’ they write, ‘has come to a standstill.’” (National Review)

Is Afghanistan “Mission Accomplished?” Brookings’ Michael O’Hanlon and Bruce Riedel: “In fact, it is mission incomplete, going worse than we had all hoped — but better than many now understand. With patience on all sides, we can still reach a tolerable outcome that prevents terrorist groups from establishing large sanctuaries on Afghan soil in the future.” (USA Today)

NCPA’s John Goodman with bad news and worse news on Social Security and Medicare. (Politico)

Cato’s Julian Sanchez: CISPA and the right way to do cybersecurity information sharing. (Cato)

Hoover’s Victor Davis Hanson: “As America re-examines its military, entitlements, energy sources, and popular culture, it will learn that our “decline” is not due to material shortages, but rather arises from moral confusion over how to master, rather than being mastered by, the vast riches we have created. If decline is fighting just two wars at a time rather than three, budgeting as we did in 2008, tapping a bit more oil offshore, or having our colleges offer more grammar courses and fewer rock-climbing walls, then by all means, bring it on.” (National Review)

Hudson’s Ronald Radosh: ‘Naming names’: A new witch hunt? (New York Post)