I must thank all of the authors for contributing to the intellectual breadth of this project. This book would not be possible without their work and specialized knowledge. In addition to his own chapter, Milton Cummings provided wise counsel and a critique of each chapter.
At Routledge, I am in debt to social science editors Amy B. Shipper and Maria C. Zamora for their support and suggestions. I also benefited greatly from the insights of Professor Steven A. Shull, editor of the Routledge series on “Politics and Policy in American Institutions.” I would also like to thank production editor Jeanne Shu and her team for helping to turn the manuscript into a book.