Since the emergence of the Arab Spring protests of 2010-2011, meaningful mass protests are observable across the world, which rely on law in their protest action. One such instance arose in India on a late winter evening in December 2019, when several elderly Muslim women organized themselves into a peaceful sit-in at Shaheen Bagh, a residential locality in New Delhi. They were protesting The Citizenship (Amendment) Act 2019 (CAA), which expedites the acquisition of Indian citizenship for the specified religious communities, except Muslims. The protestors at Shaheen Bagh creatively deployed law, particularly the Constitution of India, in their demonstration, as law was simultaneously wielded by the Indian state to supress democratic dissent in the anti-CAA protests in the country. This essay offers Shaheen Bagh as an instance of legal mobilization. It first explores the Shaheen Bagh protest as a ‘protest public’, a form of social actor theorized to examine spontaneous, self-organized mass protests around the world. It then explains how the public of Shaheen Bagh used the language of rights and the framework of legality to resist against CAA and articulate its vision of a secular and inclusive regime of Indian citizenship. In doing so, the essay argues for a critical and inclusive approach to legal mobilization, one which recognizes law as a complex terrain of social struggle and recognizes emergent forms of collective actors like protest publics. Such an analysis contributes to a more thorough understanding of the interrelation between protests and legal mobilization.