This thesis sets out the political rights that citizens are entitled to if they are to participate in a process of public justification, and proposes a framework for when these might legitimately be infringed upon. This framework is then applied to a series of controversial cases involving non-violent far-right parties in Europe between 1993 and 2007. The early chapters of the thesis set out a Rawlsian ideal of public justification and defends this against the criticisms of contemporary theorists who offer alternative versions of public reason. I argue that laws must be justified using reasons that are accessible and, at some level, acceptable to all, and that a form of deliberative democracy is constitutive of public justification. Deliber...