This guide is s jumping-off-point for anyone wanting to evaulate bias in organizations, associations and foundations.  Some of the content for this guide was taken from The Center for Media and Democracy (CMD), "a non-profit investigative reporting group," which "...report(s) ... on exposing corporate spin and government propaganda."

From: http://www.pages.drexel.edu/~garfinkm/Spectrum.html

The Varieties of European Political Ideologies and Political Parties

"The European Ideological Spectrum, compared to the US, is broader, more varied, and more nuanced.  Why?"

The graphic above is from the Frankfurt International School.

Another point of view regarding American political parties and how they can be represented graphically.  (Vagabond Scholar)