Prime Minister Scott Morrison has warned voters that the seat of Cowper is "very tight" and could decide the federal election.
Mr Morrison was speaking at a construction site at Sovereign Hills in Port Macquarie on May 9.
He met with first home buyers Josh and Bianca Farlow and their daughter Ruby as well as tradesmen and employers from building company Pycon.
The Prime Minister admitted Cowper was a "very tight contest".
He said the people of Cowper could decide who the next Prime Minister would be.
"Only by voting for Pat Conaghan can you ensure that I as a Liberal, National Prime Minister will be able to continue in that job," Mr Morrison said.
He warned voters that a vote for Rob Oakeshott would put Bill Shorten in the lodge.
"The truth is last time he was in the parliament he voted 75 times with the Labor Party and he put Julia Gillard into the prime ministership," he said.
He refused to say whether he would negotiate with Mr Oakeshott if their was a hung parliament and Mr Oakeshott was successful in Cowper.
Mr Morrison was also grilled about preferencing the United Australia Party after it was revealed its Cowper candidate Alexander Stewart described himself as "a vaccination questioner" who was "appalled at the incomplete scientific analysis of the risk versus the benefits" of immunisation".
The Port News understands the United Australia Party is undecided on the merits of vaccination.
Mr Morrison defended his record on vaccinations highlighting he was the minister who implemented the No Jab No Pay policy.
"I am the one who actually did that and we had record levels of vaccinations," he said.
"We are the government that delivered that.
"There is no arrangement that we have entered into that would jeopardise that."
The No Jab No Play policy withholds family and childcare payments from parents who refuse to vaccinate their children.