Turkey's opposition opposition party leader Miral Akchnar is due to resign after an emergency meeting of the party after growing criticism of her performance in the election.

Akchnar - formerly an interior minister and deputy to the nationalist party - the Good Party - was founded last year after she broke away from the nationalist party that backs President Recep Tayyip Erdogan and his Justice and Development Party.

Akchnar was seen ahead of the presidential and parliamentary elections last month as Erdogan's biggest and most credible challenge before he pulled the rug from under its feet Muharram Engha, the main opposition candidate.

After a two-day gathering of party officials to assess the election results, Akchnar on Sunday called for an emergency conference in which the good party would elect a new leader.

"Under the authority vested in me by the party's statutes, I have decided to call a conference with elections," she said on Twitter, "I will not run for the conference.

Miral is strongly opposed to President Erdogan and his government and has stood against the constitutional referendum of April 16, 2017, which ended with constitutional amendments that include the transition from parliamentary to presidential.

Akchnar is also described as Iron Maiden by former British Prime Minister Margaret Thatcher, as well as by the Western media of the right-wing French National Front party. They say she is Marin Loban Turkey, but she rejects this analogy because he classifies it as rightist.

Some sources note that Miral is conservative in religious matters, but prefers a secular state in Turkey, and wants to strengthen relations between her country and the European Union as well as with the North Atlantic Treaty Organization (NATO).