A strong Conservative in the
Red Tory tradition, Smith became a prominent member of the
Progressive Conservative Party. In 1956, he was considered a possibility for the party's leadership, but decided not to run, disappointing those in the party establishment who wished to prevent the populist
John Diefenbaker from becoming leader. After Diefenbaker won a surprise minority government in 1957, Smith was appointed as Secretary of State for External Affairs. Despite Smith's brilliance and popularity in academia, his success in this new role was limited. After holding the position for two years, he died suddenly of a stroke in 1959. ==Posthumous recognition==