Pauline Hanson breaks down over Burston

One Nation leader Senator Pauline Hanson has accused colleague Brian Burston of being a traitor

One Nation leader Pauline Hanson has broken down on live television as she accused party colleague Brian Burston of backstabbing her and of trying to defect to the NSW Shooters, Fishers and Farmers party.

Senator Burston on Thursday announced he would go against Ms Hanson's authority and back the federal government's $35.6 billion corporate tax cuts, with his leader labelling him a traitor.

Senator Hanson broke down in an interview with Sky News on Thursday night, admitting she was deeply hurt by his decision to defy her authority.

She accused Senator Burston of performing a "dummy spit" over not being preselected at the top of One Nation's NSW Senate ticket, and of wanting to defect from the party.

"Brian Burston I've heard tonight has actually reached out to the ... Shooters Party to join their party," she said.

The claim was rejected by Senator Burston, who told the ABC's AM program: "I would not contemplate joining that party - they rank very lowly in comparison to One Nation in the polls."

Senator Burston, who has been a member of One Nation for about 20 years, said he would remain so "unless Pauline decides otherwise".

He described his leader as doing what was politically expedient in relation to her backdown on support of the government's corporate tax, and accused her of creating "policy on-the-run in The Australian newspaper".

He said he has known his party leader for a long time and "has her moods" but was confident "she'll come back down to earth". However, he was "very disappointed" with her outburst.

Senator Hanson was unable to hold back the tears as she hit out at her One Nation colleague.

"This isn't the first time Brian's stabbed me in the back and that goes back a long time ago," she said on Sky News.

"This hurts me deeply because it means so much to me, what I'm trying to do.

"And for him to turn around and do this to me -- it's hard. But I'm going to keep going. And I'm going to get good people in that parliament beside me.

"I've been able to achieve so much in such a short period of time. And I'm not finished. And do you think I'm going to let Brian Burston or anyone else finish me? They will not just sit on the seats and do absolutely nothing.''