Prime Minister Malcolm Turnbull put Labor lies and the height of the coalition Longman byelection candidate front and centre in a speech on Saturday.
Addressing the Queensland Liberal National Party's state conference, Mr Turnbull recalled a press conference with former state MP Trevor Ruthenberg.
The "big unit", as Mr Turnbull described him, is the LNP candidate for Longman, and has been hitting the hustings hard to combat Labor lies.
"When the camera was on me when I was talking, you could see his chest," Mr Turnbull quipped.
"And then, when the camera went to Trev, you could not see me at all."
The federal opposition has doubled down on its claim the government is taking away a disputed $2.9 million from a local hospital.
"Labor is lying about health, they're lying about schools, in saying that we are cutting funding," Mr Turnbull said.
"Completely and utterly untrue. Funding is growing every year."
Labor's candidate for the July 28 byelection, Susan Lamb, told Fairfax this week she stands by the claim.
"I don't have those exact figures on me of what it should have been," she said.
"What we know, though, is it's $2.9 million less than what should have been expected in 2017 to 2020 by agreement."
Ms Lamb won Longman from the coalition on a slim margin of 0.8 per cent in 2016, sparking a byelection by resigning amid the dual-citizenship embroglio.
ReachTEL polling in June gave the coalition a 52-48 lead over Labor in the seat.
Earlier on Saturday, Mr Turnbull pledged funds for young Aboriginal Australians in Brisbane, just beyond Longman's borders.
The $1 million investment to Queensland's Achieving Results Through Indigenous Education (ARTIE) Academy run by non-profit group Former Origin Greats will assist rugby league legends to partner with schools towards better outcomes.
"What they're doing is providing the mentor that is encouraging young Indigenous kids to get ahead," Prime Minister Malcolm Turnbull said.
"It's so important. Economic advancement is absolutely critical," he told reporters.
Longman is also home to a solid base of One Nation voters, polling at 9.4 per cent in 2016.
But Pauline Hanson has confirmed the minor party won't be directing preferences to either Labor or the Liberals in the byelection.
Mr Turnbull dedicated a significant portion of his Saturday speech to One Nation's keystone issue - immigration.
"There has not been a successful boat arrival for over 1500 days," he told the conference.
"Australians alone determine who comes to Australia."