A West Australian Liberal MP is likely to call for a vote on the party leadership today following the chair-sniffing scandal involving Opposition Leader Troy Buswell.
Party whip Graham Jacobs will call for the spill this morning during a news conference outside Perth's Parliament House, says opposition treasury spokesman Steve Thomas.
Mr Buswell has been under intense pressure after admitting to sniffing the chair of a woman Liberal staffer in a Parliament House office in October 2005.
The staffer at the centre of the sniffing incident, who has asked not be named, said Mr Buswell, then deputy to former Liberal leader Matt Birney, lifted the chair and sniffed it in front of her and other people "to get a laugh".
Despite receiving strong support from colleagues, party president Barry Court and federal Opposition Leader Brendan Nelson yesterday, the incident is thought to have upset some within party ranks.
"(Dr Jacobs) is, obviously, sad and angry about the whole mess," Dr Thomas told AAP.