On defending the intangible nucleus of the Constitution, the constituted constituent power must be submitted to specific constitutional means of control, is the fundamental premise which the author is supporting along this article. To prove his hypothesis, the author starts with the debate generated by the 2007 approved electoral reform, the same that has been questioned by a wide doctrine sector of our society, considering such a constitutional reform as one which went far beyond the limits established by the contemporary constitutionalism, in particular, the fundamental right of free expression. And beyond that paradigmatic case, the author goes deeper into the basic principles of the constitutional theory to prove that, if we actually want to consolidate Mexico as an constitutional and democratic state of law, we must begin by recognizing that within every constitution there is an intangible nucleus, which must be defended of all constituted powers at any given moment, including the organ which wears faculties to reform the fundamental law.La defensa del núcleo intangible de la Constitución, y con ello el sometimiento del poder constituyente constituido a los medios de control constitucional, son las premisas fundamentales que el autor maneja en este artículo. Para demostrar su hipótesis, parte del debate generado por la reforma electoral aprobada en 2007, misma que ha sido cuestionada por un amplio sector de la doctrina, como una reforma constitucional que violentó los postes fijados por el constitucionalismo contemporáneo, en concreto, el derecho fundamental a la libertad de expresión. Más allá de este paradigmático caso, el autor se adentra a los conceptos básicos de la teoría constitucional, para demostrar que, si en verdad queremos consolidar en México un Estado constitucional y democrático de derecho, debemos comenzar por reconocer que en toda Constitución existe un núcleo intangible, el cual debe ser defendido de todos los poderes constituidos, incluido el órgano que tiene facultades para reformar la ley fundamental.

Instituto de Investigaciones Jurídicas, Universidad Nacional Autónoma de Mèxico