Presidential candidates in the Mediterranean nation of Turkey are making their closing arguments to voters before the country’s historic elections on Sunday. The country’s leader of 20 years, Recep Tayyip Erdoğan, is facing a robust challenge from six opposition parties who have united behind a candidate with a promise to return democracy to the country: Kemal Kılıçdaroğlu. As the World’s Durrie Bouscaren reports, the opposition has edged ahead in the polls.