Police in Southern California's Orange County recently raided a day labor center and hauled off a number of immigrant workers in order to have their legal status checked. In Texas, sheriffs are banding together to guard the U.S.-Mexico border, doing an end run around the Border Patrol.

In Arizona, the Democratic governor is dispatching more National Guard units to the state's southern border to offer "support" to the Border Patrol. In Washington, D.C.,...