Senator Culleton will continue his term as a senator for Western Australia independently of One Nation, according to a media release tweeted from the senator's official Twitter account on Sunday night.

The maverick senator cited a fraught relationship with Senator Hanson, a lack of respect from party colleagues and a slew of policy differences with the One Nation team.

"Policy decisions have been run in morning media, with no consultation, discussion or agreement from the party room and personal attacks and undermining, un-Australian behaviour towards myself and my team, has been ongoing and terms dictated to the team," Senator Culleton said in a statement.

"I can no longer tolerate the lack of party support for my positive initiatives, including the recent abandonment of PHON's pre-election commitment to a banking royal commission.

"Since my election to the Senate, I have consistently remained committed to all of the policies and pre-election promises, however my PHON Senate colleague's public record, shows they have not."

The WA senator accused Senator Hanson of "public rants" against him and "irrational dictates" that caused "disunity and distrust" within the party.

"I would have thought it reasonable to expect some measure of support or at the very least, some discretion and respect from the party leader and my party colleagues –  there has been none," he said.

He accused Senator Hanson and her chief of staff of trying to force him to resign and wielding control over his office.

"The PHON leader's rants against me have been accompanied by demands for my resignation and control over diaries, office management and staffing by Senator Hanson and her chief of staff, James Ashby," he said. "The irrational dictates have caused only distrust and disunity."

Senator Hanson said she was glad Senator Culleton had resigned from the party.

"Rod was a pain in my backside to tell you the truth," she told the Sunrise program. "I'm glad to see the back of him."

Senator Hanson said Senator Culleton had not been a team player, rarely attended party meetings and was always running late.

He had also "bullied" Malcolm Turnbull in a meeting over the Prime Minister's refusal to hold a banking royal commission, she said.

"He would not acknowledge that he got elected under my name, under the banner of One Nation," Senator Hanson said.

"He thinks he got elected [on his own merits]. He's ego driven and he loves the media...I didn't expect him to be this sort of man."

Senator Hanson said the main reason Senator Culleton was angry at her was that she had refused to give him party funds to help him run his various legal battles.

Tension had been mounting for weeks, with the rogue West Australian recently angering Senator Hanson by going his own way on the backpacker tax vote.

In November, Senator Hanson supported a High Court probe into Senator Culleton's eligibility to run for parliament and earlier this month, she said he was not a team player and his time in politics had "gone to his head". The former farmer said he would consider his future with the party over Christmas.

Last week, however, he told reporters he would "stay with One Nation".

BREAKING: pic.twitter.com/PTl1QHWm7G— Senator Rod Culleton (@SenatorCulleton) December 18, 2016

The embattled senator is facing legal battles, including one case before the High Court, which could render him ineligible as a parliamentarian.