He developed a close association with Zulfikar Ali Bhutto following the latter's imprisonment in 1968; this in addition to his frustration with the NAP led to his quitting the party.
[1] In 1970, he joined the Pakistan People's Party (PPP), was elected Member National Assembly in a by-election on one of the seats vacated by party founder Zulfikar Ali Bhutto and served as a Law Minister in the President Bhutto's cabinet.
[2][3] He later left the PPP after becoming disillusioned with the increasing brutality with which the government targeted the opposition.
He also defended his former comrades in the National Awami Party when they were imprisoned by the PPP government for high treason.
After leaving the PPP, he joined the opposition Tehrik-e-Istiqlal of Asghar Khan in 1973, remaining associated with that party until his death in 1987.