What I hope I would do is to non-violently occupy the National Mall with a million people and not budge until democracy was restored. Our non-violence would be absolutely necessary in order to win. This has been the lesson of history ever since the People Power revolution in the Philippines. It is certainly the lesson of Egypt and elsewhere around the world.
Armed insurrection in the USA would have two possible results: one would be the imposition of martial law and ruthless suppression of the insurrectionists by the armed forces of the United States. Jim Croce identified the strategic problem long ago in this immortal maxim, worthy of Sun Tzu, "You don't tug on Superman's Cape."
The other, less likely scenario, is Somalia. We would all end up being under the control of some armed gang, a warlord, or a local militia. It would be a lot more like "the Wire" than "Red Dawn".