Polls predict a landslide victory for Labor, which has led every poll in primary vote with results ranging from 35 per cent to 44 per cent since the start of 2026, suggesting a two-party preferred margin of between 18 and 26 percentage points. On paper, it is a rout. Yet beneath the headline numbers lies a more interesting story about how Australia's major parties are fragmenting in ways that will reverberate across the country.
Primary support for Labor is 35 per cent, well ahead of One Nation on 28 per cent and more than double the Opposition Liberal-National Party on 16.5 per cent. This is not just a bad result for the Liberals; it represents a structural breakdown. For the first time, One Nation is outpolling the Liberals in primary vote across state elections. Historical precedent offers little comfort. The largest Labor victory this century was former Premier Mike Rann in 2006 when Labor won 28 seats compared to 16 for the Liberals and Nationals. Current projections suggest Labor could exceed even that tally.
The mechanics of this breakdown are worth examining. The foundations of Labor's results are grounded less in the party's policy record than in the deepening crisis of the centre-right, with ideological splintering and a more assertive conservative politics increasingly at odds with the more socially liberal mainstream. In South Australia, this plays out in the suburbs and agricultural heartland. Much of the Liberal vote is traditionally concentrated in rural and regional seats, and One Nation is running candidates in all lower house seats and would be most hopeful of picking up some of the more regional Liberal seats, such as Hammond, with six of the Liberals' 13 current seats potentially under threat.
Leadership matters less when the currents are this strong, but it matters somewhat. A clear majority of 61 per cent of electors selected Premier Peter Malinauskas as the 'Better Premier' compared to just 30.5 per cent for Opposition Leader Ashton Hurn, with Malinauskas leading amongst both genders, all four key age groups, and both Adelaide and Country South Australia. Hurn faces an impossible task not of her own making. One experienced analyst predicts the Liberals will emerge with 11 seats, which would be a bad result consigning them to at least the next two terms in opposition, though better than an utter annihilation.
What comes after Saturday matters as much as Saturday itself. One Nation tends to poll most strongly in rural seats, but several rural electorates in SA already have independent incumbents or high-profile independent candidates, which may complicate One Nation's path to victory in these areas. Preference flows, too, remain uncertain. The right is fragmented; whether that fragmentation consolidates around a single alternative to Labor, or whether it stays fractured across one Nation and independent candidates, will determine whether the Liberals return to competitiveness in 2030.
A well-governed state requires a functional opposition. A well governed state needs a strong and vibrant Opposition overseeing the checks and balances, and the widely anticipated result will not be in the broader interests of South Australia. Labor will govern for another four years with minimal restraint. Whether that produces good policy or complacency depends not on Saturday's margin, but on how ruthlessly Malinauskas chooses to wield it.