Donald T. Critchlow, Katzin Family Professor,  teaches courses on American political history, political conspiracy, and contemporary American history. He serves as co-director of the undergraduate certificate Program in Political History and Leadership in the School of Historical, Philosophical, and Religious Studies. The program's  mission is to promote a greater understanding of the foundations of democratic society and actual leadershp training  through undergraduate education and civic involvement. The program  sponsors public lectures, academic seminars, internships, and undergraduate scholarships. He is founding editor the Journal of Policy History a quarterly academic journal published by Cambridge University Press.,

In 2018, he was named Katzin Family Professor.

His most recent books include "Republican Character: From Nixon to Reagan" (University of Pennsylvania Press. 2017); "American Political History: A Very Short Introduction" (Oxford University Press, 2015), and "When Hollywood Was Right: How Movie Moguls, Film Stars, and Big Business Remade American Politics," published by Cambridge University Press in 2013. Other publications include "The Conservative Ascendancy: How the GOP Made Political History" (Harvard University Press, 2007; rev. and updated edition University Press of Kansas. 2011); "Phyllis Schlafly and Grassroots Conservatism" (Princeton University Press, 2005); "Intended Consequences: Birth Control, Abortion, and the Federal Government"  (Oxford University Press, 1999, pap. 2001); "Studebaker: The Life and Death of an American Corporations" (Indiana University Press, 1997); and the "Brookings Institution: Expertise and the Public Interest in a Democratic Society" (Northern Illinois University Press, 1989). He is general editor for the new Oxford Encyclopedia of American Political and Legal History. "The Oxford Handbook on American Political History," co-edited with Paula Baker, has been submitted to Oxford University Press.

After receiving his doctoral degree in History from the University of California, Berkeley, Critchlow became a professor at the University of Notre Dame and later chair of the History Department at Saint Louis University. He has been a visiting professor at Hong Kong University and Warsaw University. He has lectured extensively in the United States, Europe, and China. He is the founding editor of the Journal of Policy History, a quarterly published by Cambridge University Press.

His books are regularly reviewed in the New York Times Book Review, New Republic, National Review,  The Nation,  The New Yorker, Washington Post Book Review, and other magazines and newspapers. He has appeared on C-Span Books, NPR's Talk of the Nation, BBC World News, and numerous talk-radio programs. He has written for the Washington Post, New York Observer, New York Post, National Review, and Claremont Review of Books.