David McKay, Emeritus Professor of Government at the University of Essex, UK, is the author of numerous books and articles on American and comparative politics, including Designing Europe: Comparative Lessons from the Federal Experience, which won the Political Studies Association W. J. M. MacKenzie prize in 2001. He is also co-author of Controversies in American Politics (Wiley Blackwell, 2002) and The New British Political System (2007).