ISTANBUL (AP) — The Latest on Turkey's re-run election for the mayor of Istanbul. (all times local):

1:35 p.m.

Turkish President Recep Tayyip Erdogan has voted in a closely watched repeat election for the next mayor of Istanbul, a contest that could have a political impact on his national government.

Erdogan cast his ballot at a suburban school, then was greeted by hundreds of supporters. He says "I believe the thinking voter will make the best decision for Istanbul."

The vote Sunday is being re-run after opposition candidate Ekrem Imamoglu won the Istanbul mayoral race in March. The result was canceled by Turkey's main election board, citing procedural irregularities, after the ruling party protested.

The two main candidates on the Istanbul ballot, Imamoglu and government-backed Binali Yildirim, also voted.

7 a.m.

Polls have opened in a repeat election in Turkey's largest city where President Recep Tayyip Erdogan and his political allies could lose control of Istanbul's administration for the first time in 25 years.

Opposition candidate Ekrem Imamoglu narrowly inflicted a shock defeat on a pro-government candidate in March 31 local government elections and briefly served as mayor for nearly three weeks. But the election was canceled following government complaints of procedural irregularities and a spat between the two sides over recounts.

In a hard-fought campaign, Imamoglu focused on urban poverty after the country slid into recession at the end of 2018.

Polls close at 5:00 p.m. (1400 GMT) with preliminary results expected later Sunday.