He was the Radical Party representative in the Parliaments of Federal Republic of Yugoslavia and Serbia and Montenegro.

He was elected as a Radical Party representative in the Serbian Parliament twice, in January 2007 and in May 2008.

After Tomislav Nikolić, deputy leader of the SRS in the absence of Vojislav Šešelj, resigned from the party in 2008, Todorović became president of the Radical Party parliamentary group.

While a member of the Serbian Radical Party, Todorović made statements that Serbia should include territory up to the Virovitica-Karlovac-Karlobag line, which would incorporate Bosnian and Croatian sovereign territory.

[1] On May 27, 2012, Danas reported that Todorović was ejected by the Serbian Radical Party, allegedly due to a disagreement between himself and Vojislav Šešelj.