Question: Which Australian politician with a degree in law from the University of Melbourne led the incumbent Liberal Party of Australia to election in 1966? 
Context: This is a list of members of the Australian Senate from 1951 to 1953.  The 28 April 1951 election was a double dissolution called by Prime Minister of Australia Robert Menzies in an attempt to gain control of the Senate and to pass a bill to ban the Communist Party of Australia, if necessary at a joint sitting of both houses.  All 121 seats in the House of Representatives, and all 60 seats in the Senate were up for election.  The incumbent Liberal Party of Australia led by Menzies with coalition partner the Country Party led by Arthur Fadden defeated the Australian Labor Party led by Ben Chifley and gained control of the Senate with 32 seats to Labor's 28. Federal elections were held in Australia on 3 October 1998.  All 148 seats in the House of Representatives and 40 seats in the 76-member Senate were up for election.  The incumbent Liberal Party of Australia led by Prime Minister of Australia John Howard and coalition partner the National Party of Australia led by Tim Fischer defeated the opposition Australian Labor Party led by Kim Beazley, despite Beazley's Labor Party polling more votes overall than Howard's Liberal-National Coalition. Federal elections were held in Australia on 29 May 1954.  All 121 seats in the House of Representatives were up for election, no Senate election took place.  The incumbent Liberal Party of Australia led by Prime Minister of Australia Robert Menzies with coalition partner the Country Party led by Arthur Fadden defeated the Australian Labor Party led by Herbert Evatt. Federal elections were held in Australia on 26 November 1966.  All 124 seats in the House of Representatives were up for election.  The incumbent Liberal Party of Australia, led by Prime Minister of Australia Harold Holt, with coalition partner the Country Party, led by John McEwen, was elected to an eighth term in government, defeating the Australian Labor Party led by Arthur Calwell. Federal elections were held in Australia on 9 October 2004.  All 150 seats in the House of Representatives and 40 seats in the 76-member Senate were up for election.  The incumbent Liberal Party of Australia led by Prime Minister of Australia John Howard and coalition partner the National Party of Australia led by John Anderson defeated the opposition Australian Labor Party led by Mark Latham. Federal elections were held in Australia on 28 April 1951.  All 121 seats in the House of Representatives, and all 60 seats in the Senate were up for election, due to a double dissolution called after the Senate rejected the Commonwealth Bank Bill.  The incumbent Liberal Party of Australia led by Prime Minister of Australia Robert Menzies with coalition partner the Country Party led by Arthur Fadden defeated the Australian Labor Party led by Ben Chifley. Harold Edward Holt, {'1': ", '2': ", '3': ", '4': "} ( ; 5 August 190817 December 1967), was an Australian politician and the 17th Prime Minister of Australia from 1966 to 1967.  He was born in Stanmore, New South Wales and won a scholarship to study law at the University of Melbourne.  Holt went into business as a solicitor, during which time he joined the United Australia Party (UAP).  In 1935, aged just 27, he was elected to parliament for Fawkner.  He held this seat until 1949, when he transferred to Higgins.  Holt spent 32 years in Parliament, including many years as a senior Cabinet Minister, but was Prime Minister for only 22 months before he disappeared in December 1967 while swimming at Cheviot Beach near Portsea, Victoria and was presumed drowned. Federal elections were held in Australia on 10 November 2001.  All 150 seats in the House of Representatives and 40 seats in the 76-member Senate were up for election.  The incumbent Liberal Party of Australia led by Prime Minister of Australia John Howard and coalition partner the National Party of Australia led by John Anderson defeated the opposition Australian Labor Party led by Kim Beazley. The Western Australian Liberal Party was a political party which existed from 1911 until 1917 in the Australian state of Western Australia.  The Party, which had its roots in various earlier political movements, came together in the period immediately prior to the 1911 state election under the guidance of Sir John Forrest, the Federal member for Swan and former Premier of Western Australia, and other leading political figures in the State.  It was assembled in response to the solid organisation of the Labor Party and had the aim of assisting Ministerial members in winning seats and retaining power in the Western Australian Legislative Assembly.  The Party did not involve itself in Federal politics, although many of its members were also associated with the Commonwealth Liberal Party and assisted Liberal candidates and members from Western Australia in that capacity.  The massive defeat of the Ministerial faction by Labor in that election resulted in what remained of the faction formally joining the Liberal Party, which became the first organised non-Labor movement in the State and was a precursor to the Nationalist Party and, later, the modern Liberal Party of Australia (Western Australian Division). Federal elections were held in Australia on 25 October 1969.  All 125 seats in the House of Representatives were up for election.  The incumbent Liberal Party of Australia led by Prime Minister of Australia John Gorton with coalition partner the Country Party led by John McEwen (who had also served as Prime Minister for three weeks after Harold Holt's disappearance) defeated the Australian Labor Party led by Gough Whitlam.  Even though Labor lost, the election was seen as a good result for the party as it made significant gains against the Coalition.
Answer: Harold Holt