[2] Following the Second World War, the KMS opposed the proposed Malayan Union and merged into the United Malay National Organisation (UMNO), which would become dominant in federal politics.

[3] By the 1959 Singapore general election, UMNO had gained three seats in the Malay-dominated electorates of Geylang Serai, Kampung Kembangan, and the Southern Islands.

[5] In line with the pro-Malay communal policies of its parent organisation, PKMS became a vocal opponent of Lee Kuan Yew's People's Action Party, which it accused of promoting Chinese chauvinism and discriminating against Malays.

[6] During the 1968 general election, the PKMS did not file any nominations and supported Barisan Sosialis's electoral boycott of the Singapore Parliament.

[5][6] However, it all ended with a court order on 22 March 2012 which gave Abu Mohamed and the Supreme Council the rights to administer the office.