Factbox-Key players in Turkey elections

A portrait of Turkish President Tayyip Erdogan is seen at a campaign point ahead of the May 14 presidential and parliamentary elections, in Istanbul, Turkey May 8, 2023. REUTERS/Umit Bektas

ISTANBUL (Reuters) - President Tayyip Erdogan will put his two-decade rule on the line on May 14 when he faces opposition challenger Kemal Kilicdaroglu in Turkey's landmark elections.

Surveys show Kilicdaroglu ahead of him in the first round of voting. If no candidate secures more than half of the votes in the first round, a May 28 runoff will be held between the two leading candidates.