This book investigates the strategic use of America's historical crime control, counterterrorism, national security and immigration policies as a mechanism in the modern-day Trump administration to restrict migration and refugee settlement with a view of promoting national security and preservation. National Security and Policy in America critically explores how American culture, neocolonial aspirations, and indifference towards others negatively impact long-term global security. This book examines immigration and security policies and their origins, purpose, impact, and evolution vis-à-vis the recently imposed 'travel ban' and proposed border wall across the Southern border, as well as how foreign policy influenced many of the migration flows that are often labeled as security risks. The book also seeks to understand why immigration has been falsely associated with crime, terrorism, and national insecurity, giving rise to counterproductive policies, despite evidence that immigrants face intolerance and turmoil due to the powerful distinctions between them and the native-born. This book uses an interdisciplinary framework in examining the U.S.' current response to immigration and security and will thus appeal to undergraduate and graduate students of law, social justice, criminology, critical theory, neo-colonialism, security studies, policing, migration, and political science, as well as those interested in the practical questions of public administration.