Hanson expected to campaign for first time

One Nation leader Pauline Hanson is expected to hit the campaign trail for the first time since the election was called, as a new poll shows support for the controversial party is at its lowest point since 2016.

The Queensland senator, who has been on leave after a tick bite and surgery to remove her appendix, has also revealed her party has changed its strategy of preferencing against sitting MPs .

She told The Australian on Monday that she was looking at preferences on a seat-by-seat basis.

But she attacked Prime Minister Scott Morrison's announcement the Liberals would be One Nation behind Labor, blaming former PM John Howard who she says "needs to go ... and have a full-time retirement''.

She said One Nation would make an announcement on preferences in the coming weeks.

"I am not here to shore up the Labor Party, I am not here to shore up the coalition," she told The Australian.

"My decision will be based on what is right for the people and country and ensuring One Nation is not going to get destroyed because they are determined to get rid of us.''

The latest Newspoll, published in The Australian on Monday, points to a fall in support for One Nation to four per cent following the guns-for-funds scandal.

Less than two years ago, the same poll showed One Nation had 11 per cent of the national primary vote.