One Nation’s comfortable byelection victory in the formerly safe Labor West Australian state seat of Secret Harbour shows that the right-wing populist party is now disrupting both sides of the political establishment.The seeming paradox is that Monday’s The Australian Financial Review/Redbridge Group/Accent Research poll suggests that One Nation’s national momentum has slowed, amid softening support among older voting groups that have formed an unfavourable impression of leader Pauline Hanson.Subscribe to gift this articleGift 5 articles to anyone you choose each month when you subscribe.Subscribe nowAlready a subscriber? Fetching latest articles