The government is comprised of everyday people who sell their power to the corporations who are in it for their own wellbeing. You're rights don't mean stuff to the government.
Actually, they seem to mostly pander to the people for what to do. Obama's main benefactor was the University of California (although Romney's was Goldman Sachs) and a lot of personal donations. I also don't see the government leaning towards this Tea Party wet dream of a totalitarian dictatorship they need to violently revolt against.
The United States is a government of the people, by the people, and for the people. It's impossible to become this dictatorship your speak of when there are hundreds of government officials who are cycled in and out of being just normal citizens. Few are supported by The Corporations, and many don't support motives by the ultra-rich to keep getting richer while the poor suffer. That party is currently losing pretty badly.
The notion that citizens require weaponry is patriotism that is not needed at this time. We are no longer under a dictatorship with no say in the government. We have every say in decisions for we are the government. Arming citizens only results in more harm then good, and is unnecessary.
We need to take the hint.