This book examines how presidents utilize their emergency powers, as well as factors that influence presidential rhetoric in U.S. foreign policy and declarations of national emergencies. Although scholars have examined presidential rhetoric and the influence it has on various policy arenas, this project is the first to take a text analytic approach to assess the nature of presidential rhetoric in the area of U.S. foreign policy and declarations of national emergencies. Broadly, Ouyang and Morgan seek to understand (1) how presidents exercise their authority to declare national emergencies and (2) how presidential rhetoric associated with each declaration of national emergencies changes over time. They begin by providing an overview of the development of presidential emergency powers. Then, they analyze the nature of presidential rhetoric in the context of U.S. foreign policy and national emergencies. Finally, they assess the strategic use of rhetoric in national emergency declarations and evaluate how this influences the implementation of economic sanctions stemming from these policies. In addressing these questions, this book helps to advance our understanding of U.S. foreign policy generally, national emergencies specifically, as well as the impact of presidential rhetoric on the policy selection and execution.

This book takes a social science approach to address two related questions: (1) what does Donald Trump say on Twitter? and (2) why? Since entering the 2016 Presidential Election, Donald Trump's tweets have been a major part of his communications strategy with the public. While the popular media has devoted considerable attention to selected tweets, it is less clear what those selected tweets tell us about Trump the businessman, the political candidate, and, finally, the President of the United States. We argue that to fully understand Trump, we must take a more comprehensive approach to examining all of his activities on Twitter. Overall, our analysis presents a strikingly complex picture of Trump and how he uses Twitter. Not only has his pattern of tweets changed over time, we find that Trump's use of Twitter is more deliberate than he has been given credit. Like most other politicians, Trump is strategically-minded about his presence on social media.