This is a wide-ranging book that focus the man who is the 45th president of the United States of America-Donald J. Trump. Its premise is that Trump's rhetoric and actions become more understandable, perhaps even more predictable, in the light of his personality and his worldview and view-of-the world. It, therefore, has two goals: - To delineate his personality traits and his worldview, so as to surmise on how he thinks about himself, others, and the world-at- large, and how he perceives and takes meaning from reality he experiences. - To elucidate his idiosyncratic views on governance, government, the presidency, public administration, and domestic and foreign public policy. To achieve these goals requires drawing upon concepts, frameworks, paradigms, and theories from philosophy, political science, psychology, public administration, economics, management, organizational theory, social theory, and sociology to understand his personality and worldview, and his views of the world-at-large, governance, government, and public policy. This book is targeted at those for whom the Trump phenomenon-as a presidential candidate and as president-is both fascinating and baffling, but who are not intimately familiar with Trump the man of some notoriety or with American political institution, processes, and politics. Companion volume: John Dixon and Max J. Skidmore (eds.), Donald J. Trump's Presidency: International Perspectives (Westphalia Press, Washington, DC, 2018). John Dixon is Professor of Public Administration at the Middle East Technical University in Ankara, Turkey. He is a fellow of the British Academy of the Social Sciences in 2004, and has been an honorary life member of the American Phi Beta Delta Honor Society for International Scholars since 2006.