Political Bell Curve
The standard political bell curve is a depiction of the spectrum of political belief within the United States. It is a generalization portraying the reality that the majority of Americans hold a more moderated ideology and that as ideologies become increasingly extreme, or polarized, the numbers decrease.
Most Americans identify as Independents and of the remaining portion approximately half identify as Republicans and half as Democrats.
The specific numbers vary or shift over time but this basic pattern has remained the standard.