Senante welcomed the
Republic with hardly veiled antipathy, which following
quema de conventos turned into horror and enmity. Viewing
anti-religious violence in apocalyptic terms, he advised intransigence to cardinal Segura, which in turn cost the primate expulsion from republican Spain. As the two had already developed close relationship, Senante engaged actively in a campaign defending the exiled primate. By the end of 1931 he clashed with the
papal nuncio Tedeschini, accusing him of inaction and conspiring to get the envoy recalled to
Vatican; the events forged an even closer friendship between Senante and Segura. In 1932 he publicly presented the doctrine of disobedience to the Republic, publishing his
Cuestiones candentes de adhesión and growing into a key theorist of violent resistance against the Republic. Since late 1920 Senante and the Integrists approached the
Jaimistas, and already in the spring of 1931 he publicly spoke in favor or a reunification; later that year he joined a group of mainstream Carlists representing
Don Jaime in dynastical negotiations with the deposed
Alfonso XIII. He demonstrated no hesitation when forming the united Carlist organization,
Comunión Tradicionalista. In 1932 Senante entered Junta Suprema Tradicionalista, executive of the new party, representing Levante and Andalusia. He also joined managing board of
Editorial Tradicionalista, a company taking ownership of
El Siglo Futuro, and together with fellow ex-integrist
Lamamié dominated within the body, triggering grumblings about Integrist domination in the party. The board was reconstituted by
Tomás Domínguez Arévalo by the end of 1933, though
El Siglo Futuro retained a dose of independence until 1935. In terms of
electoral tactics Senante made a U-turn. Initially he favored an alliance with the
Alfonsinos and became a leading figure in
Acción Nacional; once the coalition assumed an accidentalist tone and got infected by Christian-democratic style he turned firmly against it, growing into one of the most outspoken Carlist opponents of collaboration within either
TYRE or later
Bloque Nacional. He was also increasingly disappointed by nationalist turn of the Basque campaign; despite his Restauración and dictatorship defense of Vascongadas fueros, Senante viewed the
autonomous campaign with suspicion. He tried to resume parliamentarian career not in Gipuzkoa but in his native Alicante; outmaneuvered during coalition talks he ran as independent and was defeated both in
1933 and
1936. In 1934 Senante successfully launched the candidature of ex-fellow Integrist
Manuel Fal Conde as a party leader; despite the age difference the two developed lasting cordial relationship. The same year, together with party pundits like
Jesús Comín, he entered Consejo de Cultura de la Comunión, a body within the movement entrusted with diffusion of the ideology; in 1935, when Fal was officially appointed Jefe Delegado, Senante entered his auxiliary governing body, Council of the Communion. Early 1936 he co-drafted a document issued later by
Don Alfonso Carlos, in case of his death appointing
Don Javier as the Carlist regent. ==War and Francoism==