He later returned to the AKP leadership in 2017 following the constitutional referendum that year. Coming from an Islamist political background and self-describing as a conservative democrat, he has promoted socially conservative and populist policies during his administration.Following the 1994 local elections, Erdoğan was elected mayor of Istanbul as the candidate of the Islamist Welfare Party. He was later stripped of his position, banned from political office, and imprisoned for four months for inciting religious hatred, due to his recitation of a poem by Ziya Gökalp.