Australia's One Nation party secured a state parliament seat previously held by Labor. This victory follows the populist group's recent entry into the national lower house. The party's hard stance on immigration gains traction amid public frustrations. One Nation's rise challenges major Australian political parties ahead of upcoming elections. This win sends a clear message that no Labor seats are considered safe.

Recent polling shows support for One Nation has risen in the seat of Secret Harbour, but Labor's vote has remained steady.

One Nation have claimed a massive by-election victory in the once ultra-safe Labor seat of Secret Harbour in Western Australia.