Guerrilla warfare has broken out in the Nationals' party room.

On Monday, Llew O'Brien quit the LNP and defected to the Liberals.

Then in a surprise and embarrassing twist for the Government, he was elected as Parliament's Deputy Speaker with Labor's help.

And it's not over for the Nats, with talk of another leadership spill.

7.30's Chief Political Correspondent Laura Tingle joins The Party Room podcast this week.