Prime Minister Malcolm Turnbull will leave the "commentary to the commentators" when it comes to the fracas within One Nation.
In South Australia on Saturday, Mr Turnbull refused to weigh in on whether the coalition would snap up ousted One Nation senator Brian Burston as they had former Jacquie Lambie Network senator Steve Martin.
"We work hard under the leadership of Mathias Cormann in the Senate to persuade everybody, regardless of which party they are in, to support our measures," Mr Turnbull said.
One Nation's Brian Burston is refusing to quit his Senate seat, undercutting Pauline Hanson's power base unless she can force him out.
Senator Hanson sent her long-time supporter a letter on Friday demanding he resign from the Senate to allow her to pick a replacement.
"I no longer have confidence in in you as an officer of Pauline Hanson's One Nation party," Senator Hanson's letter said.
But Senator Burston is refusing to go, which means Senator Hanson's crucial three-vote bloc in the upper house is cut to two, vastly undercutting her influence.
"I will not be resigning from One Nation and I most certainly will not ever be resigning from my senate position," Senator Burston told 2GB radio on Friday.
He has also launched legal action against Senator Hanson's chief of staff James Ashby for allegedly leaking the "damaging revelation" that he was having a rectal examination when the party discussed its company tax stance.
Liberal Democrat senator David Leyonhjelm confirmed he had talked to Senator Burston after Friday's fracas.
"He's determined not to resign... But he will be voting independently from One Nation," Senator Leyonhjelm told AAP.
The crisis started when Senator Burston publicly revealed his plans to vote for the government's company tax cuts, after Senator Hanson reneged on a deal to back them.
An intermediary also spent two weeks trying to set up a meeting with the Shooters, Fishers and Farmers party in NSW so Senator Burston could defect.
The party didn't want him - but Senator Burston claims he wasn't aware of the approach.
Queensland Liberal senator Amanda Stoker said it was to Senator Burston's credit that he wasn't "flip-flopping according to the whims and needs" of One Nation's electoral prospects.
But Senator Hanson needed to re-evaluate her management style.
"There comes a point where you say, 'after 20 or so people have come and gone from my partyroom, maybe it's me'," Senator Stoker told the ABC.
21 people have either quit parliament, the party, been disqualified or expelled from One Nation while in parliament.
