Opposition Leader Bill Shorten, meanwhile, continued to target Coalition-held electorates in Melbourne.
It appears, despite seven weeks of electioneering, nothing much has changed for the two leaders.
The latest Newspoll has Prime Minister Malcolm Turnbull leading Opposition Leader Bill Shorten as the preferred prime minister for the fourth time in a row.
Mr Turnbull's lead stayed at exactly 15 points as both men dropped one point in today's opinion poll, which also puts the Coalition ahead of Labor 51 to 49 per cent.
But the slight improvement in the Coalition's vote does not significantly change the 50-50 standing of the major parties at the start of the campaign.
Deputy Liberal leader Julie Bishop says the Coalition will continue to show the Government has an economic plan and only the Government can be trusted to deliver jobs and growth.
"Of course, one would prefer to be ahead in the polls than behind, but we don't take any vote for granted, we don't take any seat for granted, and the Coalition candidates will be working each and every day up until 6 o'clock (Saturday) when the polls close."
Bill Shorten started his day in the Liberal seat of Dunkley, meeting and greeting voters and listening to their concerns.
(Voter:) "You want to renovate in Frankston, that's good, but the thing is, you will change a lot here, like the traffic lights ... You know, we pay a lot of money to buy the business here. We understand you, but please understand us."
(Shorten:) "This is an ideal ... this is a really good conversation to have."
Also today, a scandalous report has emerged in what would appear to be bad timing for the Coalition.
More than 130 cases of suspected corrupt activity by immigration officials have reportedly been referred to the Australian Commission for Law Enforcement Integrity in a year.
A joint investigation by Fairfax and the ABC claims rorting of the sector has also involved migration agents, employers who sponsor workers, and education providers.
Mr Shorten says, if the reports are even half true, the Australian government has lost control of its visa system to criminals.
"We discover that, if you pay up tp $50,000, you can get a bogus work visa to illegally enter this country. Mr Turnbull has to explain to us how widespread is this problem, how many tainted visas are there. Labor's been calling for reform of the visa system, and today's scandalous revelations require the Government to provide a full accounting immediately of the crisis in our visa system."
Malcolm Turnbull is promising to take the allegations with the utmost seriousness.
He says the issue will be pursued relentlessly until any offenders are identified and brought to justice.
The start of the last week of the election campaign has been conducted in the shadow of Brexit, the United Kingdom's decision to leave the European Union.
Both sides of politics have emphasised the need for calm while outlining why they are better equipped to steer the economy through a time of uncertainty.
Mr Turnbull says the country's financial regulators will help closely monitor the fallout from the decision
"The Treasury, the Reserve Bank, ASIC and APRA (are) to engage with their counterparts in the UK and in Europe and, of course, elsewhere internationally and provide a comprehensive report on the consequences to date, and the likely consequences in the future, of this decision by the British people early next week to the incoming government."
The Opposition says it is confident Brexit will have limited impact on the Australian economy.
But Labor says, if elected, it will make important structural improvements to the budget so it is in better shape to respond when and if necessary.
Finally, in a boost for South Australia, Mr Turnbull has announced a contract awarded to Raytheon Australia to upgrade the Woomera military range.
The move will double the company's 370-strong workforce over three years.
South Australia has the highest unemployment rate in the country, hitting 6.9 per cent in May.
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