A married One Nation Senate candidate has been filmed groping an exotic dancer in a strip club and asking her to come home with him.

Steve Dickson, Pauline Hanson's right-hand man, was last month embroiled in controversy after being secretly filmed alongside party colleague James Ashby by international media organisation Al Jazeera, seeking donations from powerful gun lobby groups in the US.

Senator Hanson stood by both men in a fiery press conference, though both she and Mr Dickson declined A Current Affair' s offer of an interview ahead of tonight's broadcast, as well as the opportunity to watch the story before it aired.

One Nation Senate candidate Steve Dickson has been filmed in a US strip club. (A Current Affair)

Mr Dickson was recorded groping a dancer and requesting sexual favours. (A Current Affair)

But now, A Current Affair has obtained more video from the Al Jazeera investigation into the US gun lobby, broadcasting it for the first time tonight.

The footage shows Mr Dickson at a strip club in Washington DC.

He is filmed making disparaging remarks about some of the dancers.

"Little t---, nothing there," he says of one dancer, and refers to another as a "b--ch".

Mr Dickson also gropes a dancer, and requests sexual favours from her.

"You need to slide your hand onto my c---," he says to one dancer, who declines.

Steve Dickson is campaigning for the Senate on a family values platform. (A Current Affair)

After the dance is done, he claims that the dancer had said she wanted to come home with him.

"I've asked her, she said she wants to come home and suck my d---," he said.

He later groped her breasts after she danced on the main stage.

Mr Dickson had previously been filmed meeting with US gun lobbyists. (A Current Affair)

However, he and the man filming him, fake gun lobbyist Rodger Muller, leave the strip club on their own.

Mr Dickson is also filmed saying, "I think white women f--- a whole lot better, they know what they're doing. Asian chicks don't".

"I've done more Asian than I know what to do with," he says.

One Nation leader Pauline Hanson defended Mr Dickson and colleage James Ashby after the Al Jazeera report aired. (A Current Affair)

Mr Dickson is One Nation's candidate for a Queensland Senate seat and is the leader of Pauline Hanson's One Nation in Queensland.

He has been campaigning on a platform of family values, with Senator Hanson labelling Mr Dickson "a family man, a good man".

Following the initial revelations of Mr Dickson's and Mr Ashby's meeting with US gun lobbyists, Senator Hanson - who was filmed questioning the truth of the 1996 Port Arthur massacre - also demanded Al Jazeera release the "unedited" recordings.