Look, they are prepared for virtually any possibilities these days, no matter far fetched. We have a paranoid Bush Administration.
Soldiers have/had been brought in to suppress any potential domestic violence post-bailout and post-election events. A representative was threatened with predicted rebellion if the bailout wasn't approved and had a news conference in which he admitted so - even though he "clarified" his statement and effectively said he didn't say what he said (as politicians do).
Concentration Camps, of course. The possibility is there. Physical camps? If not, they have them planned anyway. The psychological environment that Americans live under is not one of freedom, but suppression - which is why the media and everybody screams, 'freedom' all the time. Guns are so numerous that, in effect, we suppress ourselves, right?
Examine your own thoughts. Examine what limits your political thoughts and activities. The freedoms you have are negated too easily, or have little real-world results.