Professor Theriault, who is fascinated by congressional decision-making, is currently researching the distinction between ideological and war-making behavior in the U.S. Congress. He has published three books, The Power of the People: Congressional Competition, Public Attention, and Voter Retribution(Ohio State University Press, 2005), Party Polarization in Congress (Cambridge University Press, 2008), and The Gingrich Senators: The Roots of Partisan Warfare in Congress (Oxford University Press, 2013). He has also published numerous articles in a variety of journals on subjects ranging from presidential rhetoric to congressional careers and the Louisiana Purchase to the Pendleton Act of 1883.