South Australia's Liberal Party enters Saturday's state election facing not merely defeat but potential generational collapse. The opposition is not simply trailing Labour; early polling suggests it risks being overtaken by One Nation, a moment that would reshape conservative politics nationally and test whether populist discontent can convert into parliamentary seats.
Ashton Hurn has served as the leader of the Opposition in South Australia since 2025, taking over the role in December after the resignation of her predecessor Vincent Tarzia. Her promotion marks the fourth consecutive leadership change for the party in less than four years, a churn that has become central to Labour's campaign narrative. Attack advertisements circulating through Adelaide refer directly to that chaos: "four leaders in four years", the ads remind voters, before cataloguing scandals that have engulfed the party. Polls have suggested that One Nation will record a higher primary vote than the Liberal Party, between 19% and 28% compared to the Liberal's 16.5% and 20%.
At 35 years old, Hurn is a talented operator and member for the Barossa Valley seat of Schubert. But talent and ambition matter little in arithmetic. Labour won 27 seats in the House of Assembly at the 2022 election while the Liberal Party won only 16 seats, and the party now defends just 13 seats as five have been lost to by-election defeats. With a two-party preferred margin of between 18 and 26 percentage points in Labour's favour, the mathematics of a recovery simply do not exist.
Labour's dominance is not incidental but structural. A majority of 61% of electors approve of the way Peter Malinauskas is handling his job as Premier. The Premier has pursued major sporting events including AFL Gather Round, LIV Golf and MotoGP while overseeing strong economic growth, and those investments have paid electoral dividends even as failures on ambulance ramping and rising state debt have failed to dent his standing. For the past six decades, South Australian politics has been characterised by long periods of Labour domination interrupted by short-lived Liberal governments, with the Liberal Party spending a mere 17.5 years in government since 1965.
Yet the Liberals' crisis runs deeper than normal swing. The party's rural base is fragmenting under pressure from One Nation, whilst Labour is advancing into once-safe suburban territory. The Barossa Valley town of Tanunda, where Hurn made campaign stops this week, embodied the problem: One Nation now regularly outpolls the Liberals in regional South Australia. Exclusive polling showed One Nation pulling 39 per cent of the vote in regional and rural SA compared to the Liberal's 15 per cent.
Inside Liberal ranks, fundamental disagreement persists about the party's future direction. One faction argues the party must recapture voters drifting rightward on cost of living and law and order. Another warns that chasing those voters risks alienating the urban moderates needed to rebuild the party's city base. Liberal Senator Alex Antic, aligned with the party's conservative faction, criticised the disendorsement of a candidate during the campaign, warning that if such controversies forced candidates out "we might as well shut the doors on this election with one week to go". Antic has publicly flirted with defecting to One Nation, a sign of factions fracturing beyond repair.
The party's problems are not merely electoral but cumulative. Hurn initially stood by candidate Carston Woodhouse before reversing course within 24 hours after his "shocking and extreme" views on abortion, same-sex marriage and gender transitioning surfaced on a podcast. The episode exposed the deeper tensions. For many Liberal voters, the party has simply stopped being an obvious choice. Ashton Hurn's leadership approval sits at 25%, with 24% never having heard of her despite weeks of campaign activity.
One genuine uncertainty remains: whether One Nation's polling support will translate into lower house seats. The closest two-party preferred result is between One Nation at 52.5% and the L-NP at 47.5% in regional and rural seats, yet Labour's preferences will favour Independents and Liberal candidates ahead of One Nation. The electoral system works against minor parties. To win a seat, One Nation candidates must either top the primary vote or secure sufficient preferences to leapfrog both major parties. In some contests, that mathematics may prove impossible.
Inside the Liberal Party, there is acknowledgment that the moment for recovery may have passed. One senator remarked privately that given more time, Hurn might have changed the contest. But more time was not available. The party has exhausted its margin for error. Whether the Liberals emerge with eight seats or as few as three will shape the national conversation. A wipeout would not simply represent poor leadership or bad luck; it would signal that South Australia's electoral equilibrium has shifted decisively and perhaps permanently against the conservative side of politics. For a party that has governed only sporadically since 1965, Saturday may deliver the final verdict on a long decline.