A new opinion poll shows support for the federal government in Western Australia has collapsed.
The Westpoll published in the West Australian newspaper shows Labor's primary vote has fallen to 26% compared with 52% for the Coalition.
After preferences, the Coalition leads 62% to Labor's 38%.
The ABC reports the survey was taken during a recent visit to Perth by Prime Minister Kevin Rudd when he continued negotiations with mining companies over a new resources tax.
The federal Labor government proposed a 40% tax on mining profits, whixch it estimates would bring in annual revenue of $A9 billion.
The Westpoll surveyed 400 people; national polls question more than 1000.