In the context of research on the “thickening” of borders, Specters of Belonging raises the related question: How does transnational citizenship thicken across the political life cycle of Mexican migrants? In addressing this question, this book resembles what any good migration corrido (ballad) does—narrate the thickening of transnational citizenship from beginning, middle, to end. Specifically, Specters of Belonging traces Mexican migrant transnationalism across the migrant political life cycle, beginning with the “political baptism” (i.e., naturalization in the United States) and ending with repatriation to México after death. In doing so, the book illustrates how Mexican migrants enunciate, enact, and embody transnational citizenship in constant dialectical contestation with the state and institutions of citizenship on both sides of the U.S.-México border. Drawing on political ethnographies of citizenship classrooms, the first chapter examines how Mexican migrants enunciate transnational citizenship as they navigate the naturalization process in the United States and grapple with the contradictions of U.S. citizenship and its script of singular political loyalty. The middle chapter deploys transnational ethnography to analyze how Mexican migrants enact transnational citizenship within the clientelistic orbit of the Mexican state, focusing on a group of returned migrant politicians and transnational activists. Last, the final chapter turns to how Mexican migrants embody transnational citizenship by tracing the cross-border practice of repatriating the bodies of deceased Mexican migrants from the United States to their communities of origin in rural México.