Fekete-Győr run as prime ministerial candidate in the 2021 opposition primary, but was forced to resign as party leader because of his poor result in October 2021.

His paternal grandfather was agricultural engineer Endre Fekete-Győr (1926–1999), member of the Hungarian Socialist Workers' Party (MSZMP) and Chairman of the Council of Heves County between 1969 and 1981.

[6] As a legal trainee, he worked for the law firm of Péter Nagy and László Trócsányi for few months in 2013, then attended in an internship at the International Chamber of Commerce (ICC) in 2014.

The campaign was successful; after NOlimpia collected 266,151 signatures (of 138,000 required to automatically trigger a public referendum), the national government preemptively withdrew the city's bid.

[14] He announced his programme in February 2021, which included the so-called "Felcsút trials" against Prime Minister Viktor Orbán and his corrupt system (NER).

[15] He strongly opposed the introduction of the anti-LGBT law and also criticized fellow opposition party Jobbik and its leader Péter Jakab for their support.

[16] YouTube channel Partizán conducted an interview with him in April 2021, where he seemed indecisive, uncertain and insincere on many issues, which eroded his popularity during the months of the primary election campaign.

[17] Despite his low results in opinion polls, Fekete-Győr announced in August 2021 that he does not to intend to withdraw his candidacy and said the Momentum "is the guarantee of a real regime change" after 2022.

[19] In the second debate (24 September), Fekete-Győr emphasized that Klára Dobrev is less likely to defeat Viktor Orbán because of her husband Ferenc Gyurcsány and their active involvement in pre-2010 politics.

[25] He said he is grateful for "every meeting, handshake, conversation, feedback he received as party leader on behalf of the community" and he would do his best for the next president, the Momentum, and the success of the opposition coalition.

[29] Following the 2024 European Parliament election, where Momentum failed to win a mandate, Fekete-Győr ran for the leadership of party, but narrowly defeated by Márton Tompos.

[30] On October 23rd 2024 Fekete-Győr was convicted in the third instance by the Metropolitan Court for throwing a smoke bomb in front of police officers during a demonstration in 2018.