Efraín González Luna, a former member of the Mexican Catholic Student Union (Unión Nacional de Estudiantes Católicos) (UNEC), a long-time militant Catholic and practicing lawyer from Guadalajara, helped broker the party's informal alliance with the Catholic Church. However, the relationship between the PAN and the Catholic Church was not without tension. The party's founder Gómez Morín was leery of clerical oversight of the party, although its members were mainly urban Catholic professionals and businessmen. For its part, the Church hierarchy did not want to identify itself with a particular political party, since the Constitution of 1917 forbade it. In the 1950s, the PAN, which had been seen to be Catholic in its makeup, became more ideologically secular.
