While representing Mosul in the Chamber of Deputies, Hadid became a leading member of the Council of the Federation of Iraqi Industries. British influence was still immense in Iraq. During visits to the United Kingdom he supplied the press with calls for genuine parliamentary Iraqi democracy. He also opposed Iraqi participation in the pro-Western defence organisation known as the Baghdad Pact. In 1956, when Britain joined France and Israel in attacking Suez, he spearheaded the Front of National Union through which Iraq's political parties united in demanding "the combating of imperialist encroachments".