John is the Charles L. Hutchinson Distinguished Service Professor, Department of Political Science and the College at the University of Chicago. John, whose research has focused on interest groups, citizen activism and public opinion, is the author of three books, Mobilization, Participation and Democracy in America (1993) with Steven Rosenstone, Gaining Access: Congress and the Farm Lobby, 1919 - 1981 (1991), and The City in a Garden: A Historical Guide to Hyde Park and Kenwood (2019). In 1999, he received the Heinz Eulau Award from the American Political Science Association for the Best Article Published in the American Political Science Review in 1998. In 2003, he was elected a Fellow of the American Academy of Arts and Sciences.