Analysing US immigration and deportation policy over the last twenty years, this book illustrates how US immigration reform can be conceived as a psychological, legal, policy-driven tool which is inexorably entwined with themes of American identity, national belonging and white nativism. Focusing on Hispanic immigration and American-born children of Mexican parentage, the author examines how engrained, historical, individual and collective social constructions and psychological processes, related to identity formation can play an instrumental role in influencing political and legal processes. It is argued that contemporary American immigration policy reforms need to be conceptualized as a complex, conscious and unconscious White Nativist psychological, legal, defence mechanism related to identity preservation and contestation. Whilst building on existing theoretical frameworks, the author offers new empirical evidence on immigration processes and policy within the United States as well as original research involving the acculturation and identity development of children of Mexican immigrant parentage. It brings together themes of race, ethnicity and American national identity under a new integrated sociopolitical and psychological framework examining macro and micro implications of recent US immigration policy reform. Subsequently this book will have broad appeal for academics, professionals and students who have an interest in political psychology, childhood studies, American immigration policy, constructions of national identity, critical race and ethnic studies, and the Mexican diaspora.