The Prime Minister Kevin Rudd and Opposition Leader Tony Abbott are set to go head-to-head in a formal debate over health policy. It's the start of the unofficial election campaign, with voters due to go to the polls this year. But how will the leaders fare - and how important are election debates anyway? Political correspondent Melissa Clarke takes a look back at how debates in recent election campaigns have shaped political fortunes.
Broadcast: March 2010, News Breakfast, ABCNews24, ABC1
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