One Nation leader Pauline Hanson has accused Labor of inciting violence against her, warning it has “crossed a line”.

Hanson’s comments came in a social media post on Monday and followed another upswing in polling for One Nation as it secured its first Western Australian state seat with a landslide byelection result at the weekend.

“No matter how worried [Treasurer] Jim [Chalmers] and [Prime Minister Anthony] Albanese are about losing their jobs, telling Australians that their democratically elected opponents are ‘dangerous’ and a ‘threat to our country’ invites people to treat them as a threat,” she wrote.

“Words have consequences. That is how political violence is incited.”

The latest Newspoll, published in The Australian on Monday, indicates the minor party could win 30 per cent of the primary vote if an election were held today.

It puts One Nation ahead of the government’s 29 per cent and lengths in front of the Coalition, which remains in the high teens.

The Greens have nudged down to 13 per cent since the last Newspoll in early August.

On Sunday, Prime Minister Anthony Albanese took aim at Hanson and “hard-right populists”. In a speech to Queensland’s Labor conference on Sunday, he warned of a threat to democracy from those “peddling politics that is dangerous, divisive and downright dishonest”.

Chalmers, who spoke just before Albanese, said the government was aware of the One Nation threat.

“We took this threat seriously before yesterday’s byelection in the west, and we will take it seriously after it,” he said.

He said Australia, its cohesion, its people, and the economy were under threat by a dangerous and divisive coalition of chaos – “a three-ring circus of Liberals, Nationals and One Nation, with that karaoke clown from Melbourne [Liberal treasury spokesman Tim Wilson] as its chief economic spokesman”.

Hanson raised the case of former British Tory MP-turned-Reform member Ann Widdecombe, who was found ⁠dead in her rural home in July ‌after sustaining what ​police described as serious injuries. A man has been charged with her murder.

“[That] should be warning enough about the dangers of poisonous political rhetoric,” she said.

“Anthony Albanese says we need to turn down the heat and violent rhetoric in our political discourse. Meanwhile, he and his Treasurer are pouring petrol all over it.

“Australians are entitled to vote for One Nation without being told by the Treasurer and the Prime Minister that their democratic choice is a danger to the nation.”

She later shared to Facebook a photo she said was taken in Bendigo, in central Victoria, with graffiti reading “Kill Pauline Hanson”.

“The standard you walk past is the standard you accept. Labor has a problem with language that invites political violence against their opposition,” Hanson wrote.

On Monday, One Nation MP Barnaby Joyce said the party’s sense of “dry pragmatism” had attracted voters.

“They don’t like this idea that you have two people who sort of have a closed shop, a political closed shop, and you can only go to one or the other, and there’s nothing to really shake the show up,” Joyce told the ABC.

The latest Newspoll has further highlighted the Coalition’s woes. After suffering a further swing away from it in the WA byelection, it remains in third place federally.

Less than a quarter of those surveyed picked Liberal leader Angus Taylor as their first choice for prime minister, with Albanese maintaining a healthy lead of 46 per cent.

However, One Nation faced pushback at anti-immigration protests at the weekend amid confusion about its own migration targets. Hanson, who wasn’t in attendance, was booed at the Melbourne rally on Sunday.

One Nation’s new federal MP, David Farley, recently went against pledges to cut net overseas migration by 130,000, triggering rebukes from senior leaders, including Hanson, and reports he may look to quit the party.

Joyce dismissed the speculation.

“David’s got very broad shoulders,” he said.

“He’s been he’s been in, you know, tough corporate environments, and he’s more than capable to hold his own and to express his views within the One Nation Party room.”

Focus now turns to Victoria ahead of its November election, with One Nation eyeing multiple seats.

-with AAP