Mark McGowan has hit back at the man tipped to be the next NSW Premier, who described the Western Australian leader as the 'Gollum of Australian politics.'
He reignited a war of words with Dominic Perrottet, who's expected to be announced as Gladys Berejiklian's successor at Tuesday's leadership ballot.
Western Australia is gearing up for a battle to keep its share of GST revenue if Mr Perrottet gets the job to lead Australia's biggest state.
Mr McGowan vowed to fight to the death to protect its GST revenue as he fired a parting shot to the current NSW treasurer Mr Perrottet.
Mark McGowan (pictured right with wife Sarah at the Brownlow Medal) expects a stoush with rival state NSW over GST revenue
'NSW has a terrible set of finances, massive deficits, huge debt,' Mr McGowan said.
'They'll say it's Western Australia's fault because we get 70 per cent of every dollar we put into GST. NSW gets something like 96 cents back for every dollar it puts into GST; we get 70 cents back.
'We need to be vigilant about what states like NSW might do and we won't cop any undermining of our GST share and we will fight them to the death over it.'
Mr McGowan plans to congratulate Mr Perrottet if he becomes his NSW counterpart but expects a battle to protect WA's GST revenue.
'We are already funding them to the tune of billions of dollars, how do they think all