Erdogan Wins Another Term as Turkey’s President

Constitutional changes, which took effect with Sunday’s election, give leader expanded executive powers over legislation, judiciary.

David Gauthier-Villars and

Yeliz Candemir

Updated June 24, 2018 4:41 p.m. ET

ANKARA—Turkish President Recep Tayyip Erdogan won a sweeping victory in national elections Sunday, as voters extended his 15-year hold on power and endorsed his increasingly authoritarian model of government in one of Washington’s most important but often defiant NATO allies.

Citing preliminary results, state-run news agency Anadolu said Mr. Erdogan had won, capturing enough votes to avoid a runoff. With 96% of the ballots counted, the incumbent had secured 52.7% of the vote, far ahead of his nearest opponent, Muharrem Ince,...