Socialist Party

Marković was raised in a family of SPS supporters and became a party member in 2013. He was elected as president of the Socialist Youth of Serbia on 17 December 2017.^[3][4]

In a 2019 interview, he was asked for his opinion of former Serbian president and SPS founder Slobodan Milošević. Marković described Milošević as a leader who emerged "at the wrong time, in the wrong place," though adding that his legacy included two landmark accomplishments for Serbia: the Dayton Agreement and United Nations Security Council Resolution 1244.^[5]

Municipal politics

Marković received the eighth position on the Socialist Party's electoral list for the Stari Grad municipal assembly in the 2016 Serbian local elections.^[6] The list won four mandates; he was not immediately elected but received a mandate on 29 September 2016 as the replacement for another party member.^[7][8] He was promoted to the fifth position on the SPS list in the 2020 local elections and was re-elected when the list won six mandates.^[9][10] He remains a member of the local assembly and has served on the committee for the implementation of Stari Grad's youth policy.^[11]

Parliamentarian

Marković was given the fourth position on the Socialist Party's list in the 2020 Serbian parliamentary election. This was tantamount to election, and he was indeed elected when the list won thirty-two mandates.^[12] During the campaign, he highlighted the importance of Serbia's public health system established in the socialist era.^[13] The SPS continued its participation in Serbia's coalition government after the election, and Marković supported the administration in the assembly.

In his first term, Marković was a member of the committee on administrative, budgetary, mandate, and immunity issues; a member of the committee on the economy, regional development, trade, tourism, and energy; a deputy member of the foreign affairs committee; a deputy member of the committee on finance, state budget, and control of public spending; a deputy member of the committee on spatial planning, transport, infrastructure, and telecommunications; the head of Serbia's parliamentary friendship groups with Slovakia and Suriname; and a member of the friendship groups with Albania, Bosnia and Herzegovina, Bulgaria, Burundi, Ghana, the Holy See, Malta, the Netherlands, Romania, Sierra Leone, Sweden, and Tunisia.^[14]

He was promoted to the third position on the Socialist Party's list in the 2022 parliamentary election and was re-elected when the list won thirty-one seats.^[15] He served afterward as the chair of the spatial planning committee, a member of the foreign affairs committee, a deputy member of the economy committee and the security services control committee, again the leader of Serbia's parliamentary friendship group with Suriname, and a member of the friendship groups with Belarus, Bosnia and Herzegovina, Bulgaria, the Caribbean countries,^{[lower-alpha 1]} China, Egypt, France, Ireland, Kuwait, Liechtenstein, New Zealand and the Pacific Island countries,^{[lower-alpha 2]} Russia, Slovenia, Trinidad and Tobago, and the United Arab Emirates.^[16] He was briefly a deputy member of Serbia's delegation to the North Atlantic Treaty Organization (NATO) parliamentary assembly, where Serbia has observer status.^[17][18]

Marković appeared in the sixteenth position on the SPS's list in the 2023 parliamentary election and was elected to a third term when the list won eighteen mandates.^[19] He is once again the chair of the spatial planning committee and is a deputy member of the foreign affairs committee and the security services control committee.^[20]

Council of Europe

Marković became a substitute member of Serbia's delegation to the Parliamentary Assembly of the Council of Europe (PACE) in January 2023. He is an alternate member of the committee on social affairs, health, and sustainable development, and serves with the Socialists, Democrats and Greens Group.^[21]