I don't know where to start with a reply to that, because it's so unlike how the world operates and assumes some things that are not true. First, a candidate would ot ever be elected without being in a "party" because lone wolves with no "party" can't be elected because they have no support network. The party provides the support. Second, we've had decent presidents since Eisenhower. Third, no one stole anything from Sanders. He didn't win. It was that simple. Sanders did not earn sufficient support from voters to win the nomination. No on stole it from him, he never had it. Only the two-party system can work in America, which is a winner-take all. We don't have a parliamentary system. There can never be "five viable parties."