Nadra began his political activity as a member of the Federación Juvenil Comunista. He was involved in its student's organisms and in its press union. In 1970 and 1982 he was elected to be a member of the Political Relations Commission and of the Central Committee of that organization. Nadra also directed the biweekly "Aquí y Ahora" during a period of the military dictatorship and until 1984, when he began to collaborate in the direction of the
Communist Party of Argentina. In this period he was part of the Editorial Council of the magazine Nueva Era and he directed the seminary Propuesta (with a distribution of 150,000 copies). He also participated in the redactions of the documents Tesis and Informe Central, the theoretical axes of the so-called "turn" process, in the XVI Congress of the organization, in November 1986. In spite of having been elected as member of the Central Committee in that ceremony, the denaturalization of the "turn" made more evident the differences between Nadra and the hegemonic sector of the Direction. As a result, he gave up the PC on October 8 of 1990, after 26 years of militancy activity. In the first years of the decade of 1970, Nadra was one of the founders of Political Youth of Argentina and he collaborated in his reconstruction, between the military coup and 1982. That same year, the JPA were relaunched as Movement of Political Youth. Generally omitted in the testimonial and academic works about the resistance to the National Reorganization Progress (
Proceso de Reorganizacion Nacional), the action of the JPA –with the common efforts of young peronists, communists, radical, intransigent, Christian democrats and socialists, among others- motorized the reappearance of the juvenile action in the labor and student movement, the agricultural youth and the cultural spaces of actors, plastic artists and writers. Among his most important initiatives we can find the call for peace in the
Beagle Conflict, the mobilization for the visit of de Inter-American Commission on Human Rights in 1979, the march of the Commission of the 25 and of the CGT Brazil to the San Cayetano church, and on March 30 of 1982, the Day of debate and mobilization in the surrounding area of Plaza de Mayo. In parallel with his cooperation works with other political organizations, Nadra was involved in strong controversies. Many of them from his biweekly column "Temas de Debate" (Topics on Debate), in the newspaper Aquí y Ahora. In 1997, stands out his rough reply to the article of
Juan Gelman in
Página/12, although the newspaper published it partially. More recently, Nadra replied to the critics of Manuel Gaggero to the communists, in an article about the assault of the People's Revolutionary Army to the
Monte Chingolo's headquarters. In December 1997 he integrated the Confluence Forum, with a hundred of political, social and artistic personalities that claimed strong changes to the programmatic document "Carta a los Argentinos" (approved for the
Alliance for Work, Justice and Education in 1998, as an electoral platform) y questioned the election of
Fernando de la Rúa as a presidential candidate in 1999. He was part of the UNITE party, and, as a part of his direction, he accorded with
Néstor Kirchner a programmatical approach to support his candidature at the end of 2002, afterwards led by the
Front for Victory. Between 2004 and December 2015 he was delegated of Sedronar in the National Congress. ==Human Rights==