Paul Kengor, Ph.D., is the best-selling author of over a dozen books, including his latest, “The Devil and Karl Marx: Communism's Long March of Death, Deception, and Infiltration." Other books include "Takedown: From Communists to Progressives, How the Left Has Sabotaged Family and Marriage," "The Communist: Frank Marshall Davis, the Untold Story of Barack Obama's Mentor and "Dupes: How America's Adversaries Have Manipulated Progressives for a Century." He is professor of political science at Grove City College.