[1] Vasić was elected to the Pirot municipal assembly in 2000 as a member of the Democratic Opposition of Serbia, a broad coalition of parties opposed to Slobodan Milošević's administration.

[5][6] This caused a serious split at the local level; some Coalition for Pirot members who opposed joining the URS sought to overturn Vasić's leadership and expel him from the movement.

This was a controversial decision; Serbian deputy prime minister Božidar Đelić subsequently refused to visit Pirot during a tour of south Serbia.

[8] Vasić became involved in a controversy with a local newspaper in 2011, after he accused a journalist of interfering with the business of the municipal assembly by making an unauthorized recording on a handheld device.

[9] In 2012, Vasić signed a memorandum of understanding for the company Michelin to expand its Tigar Tyres plant in the municipality.

[12] Legally prevented from holding a dual mandate, he resigned his parliamentary seat on 30 August 2012; in so doing, he remarked that he did not agree with the law and did not believe he was in a conflict of interest situation.