Passion and emotion run deep in politics, but researchers have only recently begun to study how they influence our political thinking. Contending that the long-standing neglect of such feelings has left unfortunate gaps in our understanding of political behavior, The Affect Effect (The University of Chicago Press, Chicago, 2007) fills the void by providing a comprehensive overview of current research on emotion in politics and where it is likely to lead. This book was co-authored with Marcus, George E., Michael MacKuen and Ann N. Crigler.