 Though in the chamber Sánchez Marco remained member of a minuscule, 2-person Integrist opposition minority, he turned a rather restless deputy; he excelled in harassing governments during question sessions, engaging in debates and launching new motions, usually swiftly killed during the legislative process.His activity was mostly about siding with the Church, promoting religious interests and attempting to thwart liberal designs; its climax fell on the 1910 debates related to the so-called , when he animated local Junta Católica de Defensa.He became known also promoting regional establishments and especially official usage of Basque and Catalan, admitting allegiance to "nuestra lengua vascongada" and protesting exclusivity of castellano in the public realm.