One Nation leader Pauline Hanson has admitted she has been “absolutely devastated” by the recent scandals that have enveloped her party, culminating in Senate candidate Steve Dickson’s resignation today.

Mr Dickson resigned after A Current Affair aired exclusive footage last night of his shocking behaviour and lewd comments at a strip club in the US.

In recent weeks, Senator Hanson stood by Mr Dickson and his colleague James Ashby after it emerged they had met with gun lobbyists on the same US trip.

Pauline Hanson has unloaded in an exclusive interview with A Current Affair. (A Current Affair)

In an extraordinary interview with A Current Affair host Tracy Grimshaw tonight, an emotional Senator Hanson said she was “furious”.

“I’m so upset Tracy, I’ve worked for this for 23 years,” she said.

“I just feel I keep getting kicked in the guts, time and time again. And it all happens right before an election. Why were these tapes held for seven months before being released?”

She said she was “disgusted” by the behaviour Mr Dickson exhibited in the footage, and that he had let her down.

But in the wide-ranging interview, Senator Hanson also alleged there was “somebody” behind the revelations of the recent scandals, beginning with Al Jazeera’s documentary showing Mr Ashby and Mr Dickson meeting with gun lobbyists.

Senate candidate Steve Dickson resigned after last night's bombshell report. (A Current Affair)

“You can’t tell me why a foreign organisation, a foreign country, is interested in Australian politics,” she said.

“That’s the big question here.”

The One Nation leader vehemently denied her party had sought assistance or money from the NRA.

“At the end of the day, I am the leader of this party, I don’t care what Steve Dickson goes over there and says,” she said.

“We’ve never taken foreign donations.”

She suggested Mr Dickson’s comments about what One Nation could do with a funding injection of $10 million were a case of “a guy big-noting himself in a room full of big names”.

Senator Hanson vehemently denied she had sought any donations from the US gun lobby. (A Current Affair)

“James Ashby says at one point in that documentary that what he wants from the NRA is for them to harness their supporters in Australia, to get behind One Nation, he wants their software, and some donations would be super,” Grimshaw asked.

“What’s wrong with that?” Senator Hanson responded.

She said Ashby had been asking for the NRA to rally its Australian supporters behind One Nation, not to deliver foreign funds.

But despite admitting to being “furious” with what had been said by Mr Ashby and Mr Dickson, Senator Hanson said she had been calling for a national civil service – including firearms training – since her maiden speech to Parliament in 1996.

Al Jazeera aired its documentary about the US gun lobby, which featured secret footage of James Ashby and Steve Dickson, earlier this year. (A Current Affair)

She also said she wanted the electoral system to change and that she viewed it as “corrupt”.

And she had stuck with her political career because she believed in making a change for people.

“I see farmers forced off their lands, kids with no hope for the future. And people are hoping and praying that I’m going to be the voice for them. And I cop all this s--- and I’m sick of it.”

Grimshaw asked an emotional Senator Hanson why she didn’t leave politics, given the toll it was taking on her.

“Tracy, I’ve made a change out there for people,” Senator Hanson said.

“I saved people from losing their lands. I’ve helped the farming sector. I’ve helped those kids out there get apprenticeship schemes. That was introduced this year by the government – my scheme.”

A Current Affair host Tracy Grimshaw asked why Senator Hanson chose to continue in politics. (A Current Affair)

The interview also touched on comments Senator Hanson made in the same Al Jazeera documentary in which she appeared to cast doubt on the Port Arthur massacre.

“I said I read a book, and in a book it said these things,” she said.

“At no time did I ever say that it was a conspiracy theory, at no time did I ever say it was set up.”

But she acknowledged that she wished she could undo the whole ordeal.

“If I could turn back time, I’d say, ‘don’t go to America’, but you can’t,” she said.

“I have to deal with this whole situation.”

She said while she had been let down, it had not just been by Mr Ashby and Mr Dickson - pointing the finger at past associates Fraser Anning, Brian Burston and David Oldfield.

"Where are they now?" she said.

But she was more positive about the future, applauding One Nation’s recent success in state elections, including former Labor leader Mark Latham’s ascension to the NSW Upper House.

“I’m sick and tired of seeing people jump on my coat-tails because they can see a future in politics, but they haven’t got the work ethic,” she said.