What if it's diversity-driven hiring itself that is causing America's decreasing ideological diversity in the academy? That is, what if the power over professor selection seized by those claiming their intent is to increase diversity in sex and race is de facto and on average used to choose leftists instead? This study presents evidence that this may be so. There is little question the Ivy Tower's ideological diversity is on the decline, and more specifically that the professoriate is moving leftward. In this article, Christopher Hull provides potential explanations for the "leftward lurch" of U.S. academics through the following three questions: (1) Has Hiring Democratic Party Demographics Decreased Ideological Diversity? (2) Does Political Science Hiring Call for Commitment to a Particular Ideology? and (3) Does Academic Hiring Favor Diversity Over Other Values?