Under Peter Dutton’s leadership, the Coalition has placed One Nation candidates second on scores of how-to-vote cards across the country.

In return, Pauline Hanson has switched One Nation's how-to-vote cards to preference the Liberals second in seats where the Coalition is under threat.

The decision goes against decades of principled condemnation of Hanson and One Nation inside the Liberal Party, and normalises what has for almost 30 years been a shunned fringe voice in Australian politics.

It signals a change not just in campaign tactics, but in what the Liberals stand for.

Today, national correspondent for The Saturday Paper Mike Seccombe, on the preference deal between One Nation and the Liberal Party and whether it could backfire.

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Guest: National correspondent for The Saturday Paper, Mike Seccombe.

Photo: AAP Image / Brian Casey