section_path: History/Post-independence, 1965 to present
section_name: Post-independence, 1965 to present
paragraph_text: Post-independence, 1965 to present
  
  The PAP has held an overwhelming majority of seats in the Parliament of Singapore since 1966, when the opposition Barisan Sosialis (Socialist Front) resigned from Parliament after winning 13 seats following the 1963 general election, which took place months after a number of their leaders had been arrested in Operation Coldstore based on accusations of being communists affliated with the Communist Party of Malaya (CPM).
  
  It subsequently achieved a monopoly in an expanding parliament (winning every parliamentary seat) for the next four elections (1968, 1972, 1976 and 1980). Opposition parties returned to the legislature at a 1981 by-election. The 1984 general election was the first election in 21 years in which opposition parties won seats. From then until 2006, the PAP faced four opposition MPs at most. Opposition parties did not win more than four parliamentary seats from 1984 until 2011 when the Workers' Party (WP) won six seats and took away a Group Representation Constituency (GRC) for the first time for any opposition party, as well as until 2020 by which an opposition party had won more than one GRC, which was also achieved by the WP.
  
  Even so, the PAP still holds a supermajority in the legislature, to the point that Singapore is effectively a dominant party system similar to Japan's Liberal Democratic Party (LDP) rule of the country. With its supermajority, the PAP has always had the ability to amend the Constitution of Singapore at will, including the introduction of multi-member constituencies under the GRC system (in 1988) or the Nominated Member of Parliament (NMPs) scheme (in 1990), which has helped strengthened the government's dominance and control of Parliament.