 Fakih continued to work with the ministry and the Muhammadiyah, serving as the organisation's First Deputy Chair under Ahmad Rasyid Sutan Mansur. In 1956 he was one of three Muhammadiyah members who presented their concept of a truly Islamic society, one which emphasised social education. During this time he was more active with Masyumi, and after the 1955 Constituent Assembly election, Fakih was made a member of the Constitutional Assembly of Indonesia. This assembly, meant to reach an agreement for a new national constitution, failed to gain a consensus, and was disbanded by president Sukarno with his decree of 5 July 1959. That year Fakih collaborated with Hamka, Joesoef Poear Abdullah, and Ahmad Joesoef to launch the magazine Pandji Masjarakat. Sukarno later disbanded Masyumi on 17 August 1960 after leading Masyumi members, such as Mohammad Natsir and Sjafruddin Prawiranegara, were involved with the Revolutionary Government of the Republic of Indonesia; Fakih had been involved in the negotiations with the Revolutionary Government, working with Mohammad Roem.
