Malcolm Arthur Colston (5 April 1938 – 23 August 2003) was an Australian politician who served as a Senator for Queensland from 1975 to 1999. He was a member of the Labor Party until 1996, when he resigned to sit as an independent following a dispute over his candidacy for Deputy President of the Senate. Colston was a schoolteacher before entering politics, and held a doctorate in educational psychology from the University of Queensland. Early life Colston was born in Brisbane and joined the Labor Party at the age of 19 and held several branch positions in the party. He was unsuccessfully nominated for selection as a Senate candidate at the age of 23. He qualified as a teacher and taught in several primary schools while he completed a doctorate in educational psychology at the University of Queensland. He failed on two further occasions to gain Senate selection. He later wrote a book, The Odd One Out, about his political experiences. Political career Role in 1975 constitutional crisis Colston indirectly played a role in the 1975 Australian constitutional crisis. On 30 June 1975, Queensland ALP Senator Bertie Milliner died suddenly. The Labor Party nominated Colston to fill the casual vacancy in the Senate. The Constitution provides that a Senate casual vacancy is filled by a person chosen by the relevant state parliament. Although not a constitutional requirement until 1977, it was long a convention for the state parliament to choose a person nominated by the departing Senator's political party. However, the Premier of Queensland, Joh Bjelke-Petersen, claimed that Colston was a "dangerous socialist" and refused to appoint him. Officially, though, Bjelke-Petersen expressed doubts over Colston's integrity and instead appointed Albert Field, a member of the Labor Party who was staunchly opposed to the policies of the Gough Whitlam Labor government. The ALP challenged Field's appointment in the High Court, and Field was on leave from the Senate almost from the day of his appointment. That gave the Coalition a greater advantage and so was one of the crucial events that led to the dismissal of the Whitlam government. Labor Senator At the ensuing 1975 election, Colston was elected as a Labor senator. He continued to serve in that capacity until 1996. From 1993 to his retirement, he was a joint Father of the Senate, along with Brian Harradine. Resignation from Labor Party After the 1996 election, the Labor Party refused