Mir-Hossein Mousavi of Foreign Affairs and eventually the post of Prime Minister. He was the last Prime Minister in Iran prior to the 1989 constitutional changes which removed the post of prime minister; he then went into semi-retirement for the next 20 years. He remains a member of the Expediency Discernment Council and the High Council of Cultural Revolution. However, he has not participated in their meetings for years, which is interpreted by political analysts and commentators as a sign of his disapproval. For the 2009 Iranian Presidential election, Mousavi came out of semi-retirement and ran as one of two Reformist candidates
Iranian Green Movement a regular presidential election. Former Prime Minister Mir-Hossein Mousavi was the most popular candidate opposed to Ahmadinejad. The election took place on June 12, 2009 and rapidly caused the significant controversy caused by the disagreement between the government and the opposition over the results of the election. Ahmadinejad was considered to be winning in a landslide, but Mousavi and his supporters believed the results were fraudulent. They suggested that the Interior Minister Sadegh Mahsouli, an ally of Ahmadinejad, had interfered with the election and distorted the votes to keep Ahmadinejad in power. Mousavi claimed victory and called for his supporters