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In page Candidates of the 2013 Australian federal election:

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Six Senate places are up for election. The Labor Party was defending three seats. The Liberal-National Coalition was defending three seats. Senators Kim Carr (Labor), Stephen Conroy (Labor), Richard Di Natale (Greens), John Madigan (Democratic Labour), Bridget McKenzie (National) and Michael Ronaldson (Liberal) were not up for re-election.