Paul Kengor, Ph.D., is the best-selling author of over a dozen books, including his latest, "A Pope and a President: John Paul II, Ronald Reagan, and the Extraordinary Untold Story of the 20th Century." 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.