Answer
The Justice and Development Party (AKP), led by Recep Tayyip Erdogan, objected to the results of the 2019 Istanbul mayoral election, claiming irregularities and electoral fraud. The AKP's candidate, Binali Yildirim, narrowly lost to the opposition candidate, Ekrem Imamoglu. The AKP challenged the results, leading to a recount and a re-run of the election. Imamoglu won again, solidifying his victory.