As stated here, 2 party system is corrupt and self-destructive. When you listen to Jill Stein or Gary Johnson, you hear rational people talking about real problems and real solutions.
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I urge EVERYONE who is not in a battleground state to vote 3rd party, so that the news covers them more, and more voters hear their positions. This is the soft way to break the duopoly. The only other way I know involves bloodshed.