14:00 - John Howard has addressed business leaders at a meeting in the Perth seat of Cowan. Mr Howard spoke of his belief that good economic management could sustain WA's mining bill and criticised Kevin Rudd for intimating that the state's economic boom was coming to an end.

Howard also lampooned Rudd for what he said was the opposition leader's plan to invest Chinese retirement funds in Latin American property deals. 

"It's true," Mr Howard told those assembled to a general titter.

11:00 - The Prime Minister had admitted to some mistakes in an interview with Southern Cross Radio but says the WorkChoices laws are not one of them.

Mr Howard said the industrial relations changes introduced by his government were not a mistke as they had helped create jobs. Howard denied any law that "removed those terrible unfair dismissal laws on small business" could be seen as an error.

09:00 - John Howard will spend the day travelling through key marginal seats in Western Australia, after warning over the weekend that Labor's IR policy would spell the end of the mining boom.

The PM is expected to visit Cowan, Hasluck, Stirling and Swan - each held by margins of 2% or less.