Martin Bruce Cameron (born 24 August 1935) is an Australian politician. He was a Liberal Party of Australia member of the Australian Senate from May to October 1969. He was later a member of the South Australian Legislative Council from 1971 to 1990, sitting as a Liberal except during 1973–1976, when he represented the splinter Liberal Movement. State defeat and Senate term In 1968 Cameron contested the safe Labor House of Assembly seat of Millicent for the Liberal and Country League (LCL) after objecting to the views of incumbent Des Corcoran on road transport control. Cameron gained a 13% swing but lost by one vote. Cameron challenged the result at the Court of Disputed Returns, which ordered a by-election. Corcoran comfortably won the by-election. Early in 1969, Senator Keith Laught died suddenly and Cameron was nominated by Premier Steele Hall as his replacement. However, Cameron's time in the Senate was brief, for an election for the vacancy was held to coincide with the 1969 Australian federal election in October and he was defeated by Labor's Don Cameron (no relation). State politics Cameron entered South Australia's Legislative Council in 1971, following the retirement of Sir Norman Jude. He became an important ally of Steele Hall (then Leader of the Opposition), representing the increasingly visible moderate forces within the party. Cameron often opposed his fellow LCL Legislative Councillors, due to his support for Universal Suffrage for that chamber. This tension within the LCL led to the formation of the Liberal Movement the following year. Led by Hall and Robin Millhouse, the movement originally functioned as a faction within the LCL. Cameron was one of its most prominent supporters. After the 1973 Election, the LCL (led at this stage by Bruce Eastick) expelled the Liberal Movement. Although some Liberal Movement members, such as future Premiers David Tonkin and Dean Brown, decided to remain in the LCL, Cameron left with Hall and Millhouse. Cameron was the only Liberal Movement member of the Legislative Council until the 1975 Election when he was joined by John Carnie. However the Liberal Movement was vastly outpolled by the LCL (renamed the Liberal Party in 1974), and there was a push from within both parties for reunification. In 1976 Cameron and Hall rejoined the Liberal Party, while Millhouse initially formed the New LM before helping found the Australian Democrats. Despite not serving in the Tonkin ministry, Cameron assumed the