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Define coalition and explain how it is in place in Australia
In Australian politics, the Coalition is a formal alliance of broadly centre-right parties, which has existed in various forms since 1923. The partners in the alliance are the Liberal Party (LPA), the National Party (formerly the Country Party and the National Country Party), the Country Liberal Party (CLP), and the Liberal National Party (LNP). When in government at the federal level, the Liberal Party leader usually serves as Prime Minister of Australia and the National Party leader as Deputy Prime Minister, as is currently the case with Malcolm Turnbull and Warren Truss, respectively.