The loss was widely blamed on Bahçeli's refusal to consider any coalition agreement after the June 2015 election resulted in a hung parliament.

Other prominent MHP dissidents who declared their candidacy for the leadership included Ümit Özdağ, Koray Aydın and Sinan Oğan.

[49] In a controversial move, another court and the Supreme Electoral Council of Turkey (YSK) both struck down the ruling and asked the MHP leadership to not hold a congress.

[citation needed] In December 2016, the governing AKP and opposition MHP agreed to put forward a joint constitutional amendment proposal that would change Turkey's parliamentary system into an executive presidency.

[54] The referendum was very controversial due to a last-minute change in the ballot counting procedure by the Supreme Electoral Council, causing the dissident nationalists and other 'No' campaigners to allege fraud and not recognise the results.

During its preparation period, the party was touted as a 'nationalist conservative' alternative to the MHP and the AKP, while endorsing the principles of Mustafa Kemal Atatürk.

[60] The party's name, logo and slogan were immediately subject to legal challenges and controversy, with allegations that they bore resemblance to AKP Antalya Mayor Menderes Türel's 2014 local election campaign.

This was to allow the İYİ Party to form a parliamentary group that would be eligible to field a presidential candidate without the need to collect signatures and compete independently.

[66] İYİ participated in the Nation Alliance (Millet İtifakı) with the CHP, SP, and DP in the parliamentary election, receiving 9.96% of the vote.

Ekrem İmamoğlu and Mansur Yavaş won as joint Nation Alliance candidates for the Istanbul and Ankara municipalities respectively, however İYİ failed to capture any provincial or metropolitan mayorships for themselves.

On 3 March 2023, Meral Akşener announced that she took the decision to withdraw from the Nation Alliance, and said her party would not support main opposition CHP leader Kemal Kılıçdaroğlu as the joint candidate in the 2023 Turkish presidential election.

[67] However, on 6 March, Akşener and the Good Party rejoined the alliance after intense public criticism and after it was announced that Ekrem İmamoğlu and Mansur Yavaş would be appointed vice-presidents if Kılıçdaroğlu won the presidential election.

"[70][71] İYİ participated in the Nation Alliance with the CHP, SP, DP, DEVA, and GP in the 2023 parliamentary election, receiving 9.69% of the vote.

[citation needed] In addition to her being the first woman candidate for Turkish presidency in history, Akşener put great emphasis on women's rights in Turkey and made this a central plank of her presidential campaign.

She announced that her movement would spark a Tülbent Revolution - named after a traditional piece of clothing which rural Turkish women wear to partially cover their heads, but that is non-religious nor associated with political Islam.

[82][83] Her campaign drew attention to the drastic increase of cases of violence against women and rape in Turkey under the AKP administration.

The Good Party identifies the Gülen Movement as the "most serious internal threat" to national security and advocates for an effective counter-terrorism strategy against the group which have been alleged to be behind the failed coup attempt in July 2016.

[91] After the United States Congress voted to recognize the Armenian Genocide in 2019, party spokesperson Yavuz Ağıralioğlu [tr] said, "We will retaliate against it with our decision to name our children Enver, Cemal and Talat".