ANKARA, Turkey — Preliminary, unofficial results from Turkey's state Anadolu news agency showed incumbent President Recep Tayyip Erdogan ahead with 76% of ballot boxes counted, while a competing news agency gave a slight lead to the opposition candidate in a presidential runoff that will decide whether the country's longtime leader stretches his increasingly authoritarian rule into a third decade.
Anadolu showed Erdogan at 54%, and his challenger, Kemal Kilicdaroglu, at 46%.
