Despite reformists winning all 15 seats of City Council of Tehran in 1999, clash and disagreements between councilors of Executives Party, Participation Front and Solidarity Party gradually reached to the point that the council was dissolved by Ministry of Interior, two months remaining to the 2003 elections.
After many of the coalition's candidates were disqualified for the 2004 parliamentary elections by the Guardian council and reformist MPs held a sit-in in the Parliament, on January 31, 2004, the council declared it "will not participate in the election"[REF] and principlists won the election [REF].