A stark gap has emerged between One Nation's polling numbers and its prospects of translating those votes into elected representatives in South Australia, with analysis suggesting the party's dramatic surge may not deliver the lower house breakthrough supporters envisioned.
Pre-election polling showed One Nation reaching 22 to 28 per cent of the primary vote, placing the party second in the state for the first time and ahead of the struggling Liberal Party. Yet structural factors in South Australia's electoral system and the distribution of voter support across regions mean the orange wave is unlikely to fizzle into meaningful parliamentary representation in the House of Assembly.
The core problem lies in preference flows. One Nation can poll higher in safe Labor seats but not enough to threaten Labor except in Queensland. When voters for minor parties and independents have their preferences distributed, they tend to flow toward the major parties rather than to One Nation, limiting the party's ability to convert primary vote strength into seats.
Voters themselves appear to be making a distinction between support for the party and support for its candidates. Over half of One Nation's voters say they feel unrepresented, and commentary suggests many are voting for local candidates rather than endorsing Pauline Hanson's party directly. This disillusionment with the major parties has driven their primary vote, but old allegiances resurface when preference votes are counted.
Geography complicates matters further. One Nation leads with 27 per cent outside Adelaide, ahead of Labor at 24 per cent and the Liberals at 21 per cent. In regional areas, the three-candidate preferred split is Labor 38 per cent, One Nation 34 per cent and Liberals 24 per cent. Even with stronger support outside the capital, One Nation faces a crowded field. Many rural seats have sitting independents or high-profile independent candidates who have campaigned for months, making three-cornered contests unpredictable.
Labor won at least 20 per cent of the primary vote in Liberal-held rural seats at 2022. With Labor preferencing the Liberals ahead of One Nation, One Nation will need to secure a substantial first preference vote or draw sufficient preferences from minor parties and independent candidates.
In the upper house, where members are elected under a proportional election system, all signs suggest One Nation will win two, possibly three seats. The proportional voting system works in the party's favour there, allowing it to accumulate enough votes to clear the quota. Lower house contests under full-preference instant-runoff voting tell a different story.
The lesson is a familiar one in Australian politics: primary vote and parliamentary representation are not interchangeable. One Nation's ability to consolidate disaffected voters into a voting bloc has surprised many observers, but converting those votes into elected members requires more than dissatisfaction with incumbents. It requires either dominance in specific regions or assistance from preference distributions controlled by rivals.
Whether this dynamic holds on the day remains the real test. Polls measure sentiment; election results measure seats.