I doubt armed rebellion could be successful in the US. Too many Americans view the president the way Catholics view the pope; that although they may privately disagree with some of their policies, it's their religious/patriotic duty to support the pope/president at all costs. The US military and police forces are overwhelmingly pro-establishment, and the US propaganda industry is too effective at keeping the population in line for a mass uprising.
But that's how dictatorships eventually form and that should worry people, that blind patriotism and exposure to controlled media manipulating their prospective on everything, instilling irrational and excessive fear and arrogance into their culture; distracting people with tabloid junk journalism, away from the issues that really matter to people's interests as a whole. Once people are conditioned to follow a certain ideal to be self-absorbed with their own lives and are apathetic of the big picture, that's usually when they're led into a path of blindly endorsing totalitarian policies without question driven by fear or ignorance, and are weakened to protest any policy they're against, because as witnessed their opinion doesn't seem to matter. This inaction to mass protest against it is primarily likely due to fear of persecution or lack of confidence, that feeling hopelessness that nothing can be done brainwashed into them (when in reality, things can be done, but at a necessary sacrifice or risk though). Eventually when the people realize their lives are manipulated and restricted by their government to a point that makes them too uncomfortable, it's usually too late to do something about it without a violent war or uprising.
But now is a key moment, because people have just witness a blatant disregard of Democracy with their so-called 'representatives' selling them out to special interests and lobbyist groups of the financial elite. Now ask, if they do that, how do you Americans know the President regardless of political affiliation will be the same as those representatives? Both presidential candidates already showed betrayal to favor financial elite interests in the Senate. I can also assure you that this election in November will be a Pyrrhic victory no matter who wins unless America speaks or acts out.