Controversies and key dates in Troy Buswell's political career.





January 13, 2008 - Allegations emerge that Troy Buswell snapped the bra of a Labor staffer in mid-2007.





January 15, 2008 - Mr Buswell apologises for the bra-snapping, and for cuddling up to a fellow MP and making sexist remarks to another. Two days later, he is elected leader of the Liberal Party, then in opposition.





April 27, 2008 - Allegations emerge Mr Buswell sniffed the chair of a Liberal staffer, writhing in mock sexual pleasure, after she had been sitting in his office in 2005.





April 28, 2008 - Mr Buswell denies the chair-sniffing allegations.





April 29, 2008 - Mr Buswell breaks down at a press conference after admitting he had sniffed the staffer's chair .





May 16, 2008 - Then Liberal backbencher and current Minister for Corrective Services Murray Cowper says an incident in which he was "squirrel-gripped", or grabbed in the crotch, by Mr Buswell had been dealt with and was no longer an issue.





August 4, 2008 - Mr Buswell announces his resignation as Liberal leader following reports of dismal internal polling of his election prospects. Two days later, he is replaced by Colin Barnett, who forms government with the support of the Nationals the following month.





October 21, 2009 - Mr Buswell admits to signing off on a false claim for a living away from home allowance, which he describes as a clerical mistake and returns the money.





November 30, 2009 - Mr Buswell is called on to resign as a second travel allowance mistake is found.





April 25, 2010 - Then Fremantle Greens MP Adele Carles reveals she has been having a four-month affair with Mr Buswell.





April 26, 2010 - Mr Buswell admits to the affair and apologises to his wife and family. He also says he has misused his entitlements during the affair, although he is later cleared of that.





April 27, 2010 - Mr Barnett holds a press conference to announce he has accepted Mr Buswell's resignation as treasurer and as a cabinet member.





December 10, 2010 - Mr Buswell regains a position in cabinet as the housing and transport minister.





February 22, 2011 - Mr Barnett says he is disappointed in Mr Buswell for notching up nine speeding offences in three years.





June 28, 2012 - Mr Buswell replaces outgoing treasurer Christian Porter, who leaves state politics to contest the federal seat of Pearce.





December 9, 2012 - Ms Carles accuses Mr Buswell of "dry humping" businessman Nick Kailis at a 2011 Christmas party attended by several other corporate heavy hitters.

AAP