Hassan Ayat Iranian Revolution but resigned from the party. Ayat joined the Islamic Republican Party and became a member of its central committee. He was elected as a member of Assembly of Experts for Constitution in Constitutional Convention election. After that, Ayat was elected as a member of Parliament from Tehran. He was one of the main leaders in impeachment of President Abulhassan Banisadr. He was opposed to the election of Mir-Hossein Mousavi as prime minister because he believed that Mir-Hossein Mousavi was a freemasonry agent who had penetrated in the political structure of the Islamic Republic of Iran to attempt the
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