This article focuses on Mexican state practices dealing with immigration. It analyzes how the Mexican state has generated new governmentalities toward border crossings, thereby creating new (securitized) subjectivities, and to what extent such governmentalities have been the result of unequal relations with its northern neighbors versus a response to more locally driven needs. It focuses particularly on the changes since 9/11 and the Calder on Government's War on Organized Crime, both of which have engendered new dynamics in North American relations, bringing out the tensions and contradictions about security concerns; mobility of goods, services and people; and free-trade-driven regionalism. The ensuing regional focus on security and regulating the mobility of travelers, categorizing them into safe and potentially "unsafe" subjects, and migrants who are being "managed" through temporary worker programs have turned Mexico into a buffer state protecting regional North American interests. Despite its role as a buffer, the Mexican state is also "performing" its own sovereignty and following its priorities and needs, which do not necessarily coincide with those of its northern neighbor. This article analyzes these tensions in Mexico between being a buffer state and articulating its own priorities, particularly against the background of the War on Terror initiated by the United States, the War on Organized Crime, and the continuing economic crisis of 2009. The Mexican state has undergone significant modernization in terms of its border-control capacities, thus enhancing its capacity as a buffer state while enhancing its performative sovereignty. Second, the paper analyzes how these transformations have affected the mobility of "ordinary" travelers and migrants.Este art ıculo se enfoca en las pr acticas del Estado mexicano en materia migratoria. Analiza c omo el Estado mexicano ha generado nuevas gubernamentalidades de los cruces fronterizos, creando nuevas subjetividades ("securitizadas"), y la manera en que estas gubernamentalidades fueron el resultado de las relaciones desiguales de M exico con su vecino del norte, o m as bien una respuesta a necesidades locales. El art ıculo se enfoca en particular en los cambios despu es del 11/9 y la Guerra contra el Crimen Organizado emprendida por el gobierno de Felipe Calder on. Ambos eventos han generado nuevas din amicas en las relaciones norteamericanas, evidenciando las tensiones entre la seguridad, la movilidad de bienes, servicios y personas, y el regionalismo articulado en torno al libre comercio. El enfoque regional de la seguridad y la regulaci on de la movilidad Latin American Policy-Volume 8, Number 1-Pages 5-26 V C 2017 Policy Studies Organization. Published by Wiley Periodicals, Inc.de los viajeros, categoriz andolos en sujetos "seguros" y "potencialmente inseguros", as ı como de los migrantes cuya movilidad es gestionada por medio de programas de trabajadores temporales, han convertido a M exico en un estado amortiguador y protector de los intereses norteamerica...