It was founded before independence, in 1957, and has opposed the People's Action Party since that time. Its only MP at the moment is Low Thia Khiang, who is member for Hougang. It had 4 MPs from 1957 to 1958, but the most it has ever had in recent times was 2, from 1997 to 2001, when J. B. Jeyaretnam was a non-constituency MP.
See also: Politics of Singapore, List of political parties in Singapore.