of his cabinet. Before taking over, Lee pardoned several PAP members, who had been arrested under the Emergency Regulation in 1956 and 1957, including left-wing leader Lim Chin Siong. During the election campaign, Lee had called for pardon as part of his election platform, causing an increase of morale of many trade union members. After their release, Lim and his affiliates would later challenge Lee's leadership in the PAP, leading to the expulsion of most of the left-wing members from the PAP in 1961. The expelled members would then form the Barisan Sosialis, and posed a strong challenge against the PAP on the next election in 1963; although being crippled by Operation Coldstore, they came closer to removing the PAP from power than any other party to date. By-elections Two by-elections, both held in 1961, occurred during the term in Parliament. Former PAP minister Ong Eng Guan was re-elected in Hong Lim running as an independent after leaving the PAP, whilst David Marshall was elected in Anson after the death of PAP MP Baharuddin Mohammed Ariff. References Bibliography External links General Elections 1959 Singapore Elections General elections in Singapore Singapore 1959 in Singapore