Each party has a platform--a pre-fixed menu of beliefs making up its worldview. The candidate can choose one of the two platforms, but remember: no substitutions. For example, do you support healthcare? Then you must also want a ban on assault weapons. Pro limited government? Congratulations, you are also anti-abortion. Luckily, all human opinion falls neatly into one of the two clearly defined camps. Thus, the two-party system elegantly represents the bi-chromatic rainbow that is American political thought.