For four decades I have been teaching Mexican Political System in the Political Science and Public Administration degree program at the Autonomous University of Baja California Sur. A decade ago, the electronic journal Hechos y Derechos of the Instituto de Investigaciones Jurídicas of the Universidad Nacional generously offered me a space to publish articles related to my teaching work. Over time I have discovered that I like teaching because it allows me to tell stories, some of which, like the great Gabriel García Márquez, I have lived and live to tell. The cases that I incorporate here have been published, on different dates, by the Instituto de Investigaciones Jurídicas de la UNAM, thanks to the hospitality of Dr. Jorge González Galván, director of the aforementioned journal. I have constructed and commented on all of them in my classes, especially since 2011. I believe that case studies are a formidable didactic tool for university students to assimilate knowledge, especially to contrast the postulates of the General Constitution of the Republic with the contemporary history of Mexico.