Coming to serve you a warrant soon

The latest paranoid fantasy is that the US Department of Homeland Security is beefing up its presence in the United States by federalizing local police forces, assuming much of their costs, and supplying them with armoured personnel carrier trucks called MRAPS, which are mine-resistant fighting platforms on wheels.

Many sightings of large movements of armored behicles through the United States have excited  the usual loons, but,unfortunately in the environment created by Obama, where Muslim terrorism is given due process, and American conservatives are hounded by the IRS, one can find some sympathy for the paranoid.

Is the US government expecting an uprising soon, and if so, from whom: angry whites, angry blacks, or angry Latinos?