公民身份这一概念是政治哲学的关键词,我们借助它得以探究政治学的这一重要的传统及其现代表现。从美国宪政的发展经验来看,公民同时具有联邦和州的公民身份是联邦主义得以实现的重要法律技术。本文通过对公民身份的各种理论解释的讨论,呈现双重公民身份在美国联邦制建构中的功能与意义。美国最高法院在有关 The concept of citizenship is the key to political philosophy, which we use to explore this important tradition of political science and its modern performance. From the experience of constitutional development in the United States, it is an important legal technique for citizens to have both federal and state citizenship. Through the discussion of various theoretical explanations of citizenship, this paper presents the function and significance of dual citizenship in the construction of the federalism in the United States. The United States Supreme Court is concerned