Pauline Hanson says she has a responsibility to all of Australia and rejects Labor's claims she has sold Queensland out by backing a bigger share of GST for Western Australia over her home state.
The One Nation leader is supporting her WA colleague Senator Peter Georgiou's call for a "better GST deal" for the state and told reporters when she landed in Perth on Friday that she wasn't surprised Labor was "jumping up and down".
Senator Hanson says a lot of Australians back her stance.
"What is fair, what is just - that's all we're asking for and I'll stand by that."
Labor leader Bill Shorten, campaigning on Friday in the Longman federal by-election in Queensland where One Nation is also standing, said Senator Hanson had abandoned her state.
The federal government is due next week to release a report by the Productivity Commission into the GST carve-up between the states and territories, which could recommend changes to the existing formula.
Queensland Treasurer Jackie Trad, who released her state budget last week, fears the state could lose $1.6 billion if the formula is changed.
But Treasurer Scott Morrison said the government would deliver a "fair" long-term plan to fix the GST carve-up for all states and territories.
WA's share shrank to less than 30 cents in the dollar in 2016-17 due to the lag effect of the formula accounting for bonanza revenues during the mining boom.
