National Party of Australia in the context of Deputy Prime Minister of Australia

A federal election was held on 21 August 2010 to elect members of the 43rd Parliament of Australia. The incumbent centre-left Australian Labor Party led by Prime Minister Julia Gillard won a second term against the opposition centre-right Liberal Party of Australia led by Opposition Leader Tony Abbott and Coalition partner the National Party of Australia, led by Warren Truss, after Labor formed a minority government with the support of three independent MPs and one Australian Greens MP.

Labor and the Coalition each won 72 seats in the 150-seat House of Representatives, four short of the requirement for majority government, resulting in the first hung parliament since the 1940 election. Six crossbenchers held the balance of power. Greens MP Adam Bandt and independent MPs Andrew Wilkie, Rob Oakeshott and Tony Windsor declared their support for Labor on confidence and supply. Independent MP Bob Katter and National Party of Western Australia MP Tony Crook declared their support for the Coalition on confidence and supply. The resulting 76–74 margin entitled Labor to form a minority government. The Prime Minister, government ministers and parliamentary secretaries were sworn in on 14 September 2010 by the Governor-General Quentin Bryce. In November 2011, Coalition MP and Deputy Speaker Peter Slipper replaced Labor MP Harry Jenkins as Speaker of the House of Representatives, increasing Labor's parliamentary majority from 75–74 (not including Jenkins as he was unable to vote on legislation due to his role as Speaker) to 76–73 (not including Slipper as he was unable to vote on legislation due to his role as Speaker).

The Liberal Party of Australia (LP) is the prominent centre-right to right-wing political party in Australia. It is considered one of the two major parties in Australian politics, the other being the Australian Labor Party (ALP). The Liberal Party was founded in 1944 as the successor to the United Australia Party. Historically the most electorally successful party in Australia, the Liberal Party is now in opposition at a federal level, although it presently holds government in the Northern Territory, Queensland and Tasmania at a state (sub-national) level.

The Liberal Party is the largest partner in a centre-right grouping known in Australian politics as the Coalition, accompanied by the regional-based National Party, which is typically focussed on issues pertinent to regional Australia. The Liberal Party last governed Australia, in coalition with the Nationals, between 2013 and 2022, forming the Abbott (2013–2015), Turnbull (2015–2018) and Morrison (2018–2022) governments. The Coalition has been suspended on occasion throughout the 20th and 21st centuries, though as of 2025 the two parties form a shadow ministry under the leadership of Sussan Ley.

In Australian parliamentary practice, the Opposition or the Official Opposition consists of the second largest party or coalition of parties in the Australian House of Representatives, with its leader being given the title Leader of the Opposition. The Opposition serves the same function as the official opposition in other Commonwealth of Nations monarchies that follow the Westminster conventions and practices. It is seen as the alternative government and the existing administration's main opponent in the Australian Parliament and at a general election. By convention, the Opposition Leader in the federal Parliament comes from the House of Representatives, as does the deputy, although the Government and Opposition may also both have leaders in the Senate. The Opposition is sometimes styled as His Majesty's Loyal Opposition to show that, although the group may be against the sitting government, it remains loyal to the Crown (the embodiment of the Australian state), and thus to Australia.

The current Opposition at a federal level is the centre-right Liberal Party/National Party Coalition, led by Sussan Ley.

Warren Errol Truss AC (born 8 October 1948) is a former Australian politician who served as the 16th deputy prime minister of Australia and the minister for Infrastructure and Regional Development in the Abbott government and the Turnbull government. Truss served as the federal leader of the National Party of Australia (The Nationals) between 2007 and 11 February 2016 when he announced his decision to retire and not contest the 2016 federal election. He was the member of the House of Representatives for Wide Bay from the 1990 election until his retirement in May 2016. Following the merger of the Queensland branches of the Nationals and Liberals, Truss was re-elected in 2010 for the Liberal National Party.

The 1940 Australian federal election was held in Australia on 21 September 1940. All 74 seats in the House of Representatives and 19 of the 36 seats in the Senate were up for election. The incumbent Coalition, consisting of the United Australia Party led by Prime Minister Robert Menzies and the Country Party led by Archie Cameron, defeated the opposition Labor Party under John Curtin despite losing the overall popular vote.

The Coalition won 36 seats, two short of a majority, but formed a government on 28 October 1940 with the support of both independent crossbenchers, Alexander Wilson and Arthur Coles. The four MPs elected to Lang Labor's successor, the Australian Labor Party (Non-Communist), officially re-joined the ALP just months after the election in February 1941, bringing the ALP to 36 seats. The UAP–Country minority government lasted only until October 1941, when the two independents crossed the floor and allowed the ALP to form a minority government with Curtin as prime minister. It remains the only time since the 1910 introduction of the two-party system where the government has changed as the result of a parliamentary confidence vote.

Robert Bellarmine Carl Katter (born 22 May 1945) is an Australian politician who has served as the member of parliament (MP) for the Queensland division of Kennedy since 1993 and father of the House since 2022. He was active in Queensland state politics from 1974 to 1992 and was a member of the National Party until 2001, after which he left to sit as an independent until he formed Katter's Australian Party as his own party in 2011.

Katter was born in Cloncurry, Queensland. His father, Bob Katter Sr., was also a politician. Katter was elected to the Queensland Legislative Assembly at the 1974 state election, representing the seat of Flinders. He was elevated to cabinet in 1983, under Joh Bjelke-Petersen, and served a government minister until the National Party's defeat at the 1989 state election.

The Western Australian National Party, officially known as the National Party of Australia (WA) Inc, and branded as Nationals WA, is a political party in Western Australia. It is affiliated with the National Party of Australia, but maintains a separate structure and identity. Between 2021 and 2025, the Nationals were the senior party in an opposition alliance with the WA Liberal Party in the state parliament.

Founded in 1913 as the Country Party of Western Australia to represent the interests of farmers and pastoralists, it was the first agrarian party in Australia to contest and win seats at the 1914 state election. Since then, it has continuously held seats in the state's Legislative Assembly and Legislative Council, particularly in the state's Wheatbelt region, and for many years, it also held federal seats.

Peter Neil Slipper (born 14 February 1950) is an Australian former politician and bishop who served as the 27th speaker of the Australian House of Representatives from 2011 to 2012. A member of the Liberal Party of Australia for most of his career, he was the member of parliament (MP) for the division of Fisher from 1984 to 1987 and again from 1993 to 2013. He is the current bishop in Australia for the Catholic Apostolic Church of Australia (ICAB) a mission of the Brazilian Catholic Apostolic Church (Igreja Católica Apostólica Brasileira) and an honorary consul for Brazil in Australia.

Slipper is originally from Ipswich, Queensland, and studied arts and law at the University of Queensland. He worked as a lawyer and farmer before entering politics. Slipper was first elected to parliament at the age of 34, standing as a member of the National Party. He was narrowly defeated after one term, but reclaimed the seat at the 1993 election as a member of the Liberal Party. During the Howard government, he served as a government whip and a member of the ministry as a parliamentary secretary now designated as assistant ministers.

The Fraser government was the federal executive government of Australia led by Prime Minister Malcolm Fraser. It was made up of members of a Liberal–Country party coalition in the Australian Parliament from November 1975 to March 1983. Initially appointed as a caretaker government following the dismissal of the Whitlam government, Fraser won in a landslide at the resulting 1975 Australian federal election, and won substantial majorities at the subsequent 1977 and 1980 elections, before losing to the Bob Hawke–led Australian Labor Party in the 1983 election.