Factbox-Key players in Turkey's election campaign

FILE PHOTO: Turkish President Tayyip Erdogan attends a ceremony to mark an increase in capacity at a natural gas storage facility in Silivri near Istanbul, Turkey, December 16, 2022. REUTERS/Umit Bektas/File Photo

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 suggest a tight race that may go to a runoff two weeks later.

Erdogan's Islamist-rooted AK Party counts the nationalist MHP as its main ally. The secularist CHP and five other parties form an opposition alliance that is expected to get support from the main Kurdish party HDP, giving it an edge in some polls.