Drawing on extensive research and national survey data, sociologist Donald I. Warren here presents an in-depth analysis of the Middle American Radicals, who they are, what they believe, the major targets of their grievances, and the likelihood of their political mobilization. The evidence indicates that as many as one in five Americans shares the Radical Center perspective, including people who outwardly seem to have very little in common by way of economic, occupational, or education status. Of particular significance are the findings concerning potential support for the various presidential candidates and for a third national political party.