[4] He was re-elected to the Belgrade assembly in the 1996 Serbian local elections and also led the Socialist Party to a majority victory in Grocka, where he was confirmed as mayor for a second term.
[5][6] During the 1990s, political life in Serbia was dominated by Slobodan Milošević, the leader of the Socialist Party, who oversaw the country's governmental institutions in an authoritarian manner.
Milošević was defeated by Vojislav Koštunica of the Democratic Opposition of Serbia (DOS) in the 2000 Yugoslavian general election, an event that brought about wide-reaching changes in the country's political scene.
The DOS won a narrow victory over the SPS for the Grocka municipal assembly in the same electoral cycle, and Janković's term as mayor came to an end.
For this election, the entire country was counted as a single electoral district and all mandates were awarded to candidates on successful lists at the discretion of the sponsoring parties or coalitions, irrespective of numerical order.
[33] A shift in the municipal politics of Grocka saw the Socialists take a prominent role in the local coalition government and Janković return to mayor's office on 22 June 2010.
[36][37] The Serbian Progressive Party (Srpska napredna stranka, SNS) won the election at the municipal level in Grocka, and Janković was succeeded as mayor by Dragoljub Simonović.
At the city level, the Democratic Party (Demokratska stranka, DS) won a minority government in the 2012 Belgrade election under the leadership of incumbent mayor Dragan Đilas.
[42] He subsequently led the Socialist list in Grocka for the 2016 local elections and was re-elected when it won five mandates, although he soon resigned from the municipal assembly to continue serving on city council.