Bennelong by-election breakdown

KEY FACTS ON THE BENNELONG BY-ELECTION:

* Bennelong was first proclaimed in 1949

* It was held by former prime minister John Howard from 1974 to 2007

* It's only had four MPs with three of them Liberals

* In Bennelong, 20 per cent of people have Chinese ancestry

* The electorate is named after Aboriginal man Woollarawarre Bennelong who died in 1813

CANDIDATES

* John Alexander is a former professional tennis player who's held the seat since 2010

* Kristina Keneally is a former NSW Labor premier who was later the National Basketball League's chief executive

* 10 other candidates, include the Australian Conservative's Joram Richa and Greens candidate Justin Alick

KEY ISSUES

* Labor have campaigned on their record in healthcare and education

* The government has attacked Ms Keneally's record as NSW premier and links to corrupt state MPs

* The Liberal Party has promised a $100 million transport hub in Macquarie Park

* The Chinese-Australian vote could be crucial after the government attacked Labor over Sam Dastyari's links to Chinese donors

DIRTY TRICKS

* The Liberal Party admitted buying the domain kristinakeneally.com to run a smear campaign

* Labor has been accused of doctoring a video of John Alexander detailing cuts to training and education

WHAT THE POLLS SAY

* A Newspoll published on Tuesday put Labor and the Liberals at 50-50 on a two-party preferred basis

* A Fairfax Media-ReachTEL poll published on Thursday put the Liberals ahead 53-47

THE IMPLICATIONS

* Malcolm Turnbull would lose his absolute parliamentary majority if Bennelong falls to Labor.

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