Erdogan Secures Endorsement of Former Rival for President

The candidate who came in third in Turkey’s presidential election last week announced on Monday that he was endorsing President Recep Tayyip Erdogan in the runoff vote on Sunday, granting Mr. Erdogan an additional boost against his remaining challenger.

Mr. Erdogan, the dominant figure in Turkish politics for 20 years, appears to have an edge in the runoff, whose victor will shape Turkey’s domestic and foreign policies for the next five years. Throughout the campaign, Mr. Erdogan aimed to link himself in voters’ minds with the image of a strong Turkey, with expanding military might and geopolitical clout.

Although most polls in the run-up to the initial vote on May 14 showed Mr. Erdogan trailing his main challenger, the opposition leader Kemal Kilicdaroglu, the president overcame voter anger at high inflation and frustration with the government’s initially slow response to catastrophic earthquakes in February to win 49.5 percent of the vote.

Mr. Kilicdaroglu, the joint candidate of a coalition of six opposition parties that came together to try to unseat Mr. Erdogan, won 44.9 percent.