PRIME Minister Malcolm Turnbull will lock Australia's 15 million voters into a 55-day election campaign tomorrow when he visits Governor-General Sir Peter Cosgrove.
The Prime Minister will cut short Mother's Day celebrations with his wife Lucy to advise Sir Peter to formally order Australia's first Double Dissolution election since 1984. 
Mr Turnbull is seeking to become the first Prime Minister since John Howard to serve an entire term of Parliament in office.
In a campaign set to be focused on jobs and the economy, Mr Turnbull will ask voters to give him a mandate to continue governing after he seized power from Tony Abbott in   September last year.
The two major parties are neck-and-neck in the polls and have already moved into campaign mode ahead of visits by their leaders to key marginal seats next week.
In an early sign of how tough the eight-week political engagement will become, Opposition Leader Bill Shorten yesterday accused Mr Turnbull of lying.
Mr Shorten made the claim after Treasury officials revealed the Government's 10-year plan for business tax cuts had been costed at $48.2 billion.
"Mr Turnbull told a blatant political lie yesterday when he said Treasury hadn't worked out the cost of that item," the Labor leader said.
"The Prime Minister of Australia looked down the barrel of the camera and he lied to Australians about whether Treasury had costed his expensive plan to give tax cuts to multinationals.
Mr Turnbull strongly denied Mr Shorten's suggestion.
"The projections for the enterprise tax cuts, the company tax cuts, were of course calculated by Treasury, they made those assumptions," he said.
In recent weeks, the Government has moved to sure up its fortunes in South Australia by confirming 12 submarines will be built at the ASC in Osborne.
In the closest SA election race, key western suburbs seat of Hindmarsh, incumbent Liberal MP Matt Williams is facing a strong challenge from Labor predecessor Steve Georganas.
South Australian Senator Nick Xenophon is likely to emerge as a new powerbroker in the Upper House when he is joined by up two members of his Nick Xenophon Team.
Mr Turnbull's decisions to call a Double Dissolution poll means that voters in each state will elect 12 senators instead of the usual six.
Mr Shorten's Labor team would need to win an additional 19 seats to replace the Coalition.PAGE 62: EDITORIAL