I agree it's a problem, but the US probably couldn't get out of the two party rut in the next decade unless there was some incredible countrywide revolution. Too many news sites trivialize anything other parties do.
Based on what I've seen the "first party" debates are also somewhat rigged too since they have certain things they aren't allowed to talk about or actually must talk about even if the situation isn't as bad as everyone makes it out to be. Going off of the information John Green presented at www.youtube.com/watch?v=3ugDU2qNcyg, the national debt really isn't that big of a problem for us for example.