[2] He joined the monarchist Serbian Renewal Movement (SPO) headed by Vuk Drašković in 1993, and a year later, he was named a member of the party presidency.

[3] Mihailović ran as SPO candidate for President of Federal Republic Yugoslavia in the 2000 Yugoslav general elections, winning 2.95% of the popular vote.

[11] In late 2007, the president of Together for Kragujevac, also the co-president of the SDPO, signed a coalition agreement with the leader of G17 Plus, Mlađan Dinkić, which Mihailović opposed.

During his speech at the founding assembly of SNO, Mihailović stated that "SNP will strive to preserve the identity of Serbs in the region, the ties between the motherland and the diaspora".

[14] He was the party's ballot carrier in the 2018 Belgrade City Assembly election, however, POKS only won 0.53% of the popular vote and failed to pass the electoral threshold.

[18] Mihailović's faction announced on 28 December that Gojković and his prominent ally Mirko Čikiriz had been expelled from the party.

[22][23][24][25] Shortly after, Mihailović was recognised as legitimate president by POKS's coalition partner, the Democratic Party of Serbia and its leader Miloš Jovanović and Mihailović was announced as the National Democratic Alternative (NADA) coalition's candidate for Mayor of Belgrade in the upcoming 2022 Belgrade City Assembly election.

[26] Due to Gojković still legally representing the POKS leadership, Mihailović had to register under the "For the Kingdom of Serbia" organisation for the 2022 elections.