The Thinkers: The Rise of Partisan Think Tanks and the Polarization of American Politics - Paperbackby E. J. Fagan (Author) Increasingly, political parties have adopted not only different policies, but different sets of facts. As E. J. Fagan argues, partisan think tanks have helped create these alternate realities in their capacity as de facto formal party organizations. Through the analyses generated by aligned think tanks, political elites on both the left and right frequently offer radically different assessments of a policy's consequences, such