Mark McGowan is firmly on track to replace Colin Barnett as West Australian premier after voter support for Pauline Hanson's One Nation in the state plummeted, the latest Newspoll shows.
The survey taken this week for The Australian shows Labor leading the Liberal-Nationals alliance by 54 per cent to 46 per cent in two-party-preferred terms.
It also showed One Nation's primary vote across WA dived from 13 per cent to 8 per cent in just six weeks.
