South Australian political leaders will this week launch the final push of their campaigns, with federal politicians expected to join the last-minute grab for votes ahead of the March 17 state election.
Neither the House of Representatives nor the Senate will sit in Canberra until after the election, freeing up federal politicians to spend time with candidates in South Australia.
During a trip to South Australia's McLaren Vale wine region on Saturday, Prime Minister Malcolm Turnbull was glowing in his endorsement of state Liberal Leader Steven Marshall.
"This guy is an absolute vital necessity for South Australia," he said.
"(Steven Marshall) will form a government, because I have great faith that the people of South Australia will recognise that they need an advocate for jobs, an advocate for business and investment in this state."
Despite his praise for Mr Marshall, Mr Turnbull would not comment on the future leadership of the party if Labor were to win a fifth consecutive term at the March 17 poll.
His visit followed a similar appearance from Opposition Leader Bill Shorten, who joined Premier Jay Weatherill on the campaign trail last Tuesday.
But Mr Shorten was reluctant to predict the result of the election, telling reporters Mr Weatherill has the best vision for the state but faces an "uphill battle" to win Labor a record fifth straight term.
"Jay's got the vision for healthcare and I can work with Jay Weatherill to make sure that we properly provide the healthcare that South Australians deserve," he said.