Mir-Hossein Mousavi parliament did not give him the vote of confidence, and he was defeated with a vote of 80 to 74. Although Khamenei had strong reservations with Mousavi, as a compromise with the left-leaning parliament, agreed to offer Mousavi for the post of premier. On 28 October 1981, with the approval of Khomeini, the parliament approved Mousavi with a vote of 115 to 39 to become the 79th prime minister of Iran on 31 October 1981. The conflicts between Mousavi, who belonged to the left wing of the Islamic Republic, with Ali Khamenei (the current leader of Iran), who belonged to
Mir-Hossein Mousavi sphere. When Khomeini, the founder of the Islamic Republic, died in 1989, Mousavi was no longer welcome in the government. It was the start of 20 years of an almost total absence from public life for Mousavi, which many considered as a sign of his disapproval of the established government, though he did sit on two high-level government councils. In 1989, Ali Khamenei named him as a member of the Expediency Discernment Council, his membership of which still continues. Mousavi has been a member of the Supreme Council of Cultural Revolution since 1996. He was also the political adviser of