[4] Vujadinović received the forty-first position on the DS's electoral list in the 2007 Serbian parliamentary election.
)[6] The DS formed an unstable coalition government with the rival Democratic Party of Serbia (Demokratska stranka Srbije, DSS) and G17 Plus after the election, and Vujadinović served as a supporter of the ministry.
In September 2007, he wrote an opinion piece for Danas about the corrosive effects of television on assembly debates.
Vujadinović resigned his parliamentary mandate on 3 December 2009, having been selected as mayor of Kosjerić earlier in the year.
[13] Serbia's electoral system was reformed in 2011, such that parliamentary mandates were awarded in numerical order to candidates on successful lists.
[14] The DS experienced a serious split in early 2014, with former leader Boris Tadić setting up a new breakaway group that was originally called the New Democratic Party.