What could happen when the Nationals meet

NATIONALS PARTYROOM MEETING: WHAT'S AT STAKE

* Backbencher Llew O'Brien plans to call for a leadership spill at the 9am meeting, opening up Michael McCormack's job

* The party's former leader Barnaby Joyce has confirmed he will put his hand up for the leadership role

* Senator Matt Canavan has resigned from the ministry in a show of support to Mr Joyce

* A new deputy leader will be elected to replace Bridget McKenzie after she quit the position over the sports rorts scandal

* Queensland minister David Littleproud is considered the frontrunner for the deputy job

* A reshuffle of the front bench will occur

* Littleproud could regain his old portfolio of agriculture after it was given to McKenzie following the election

* Victorian MP Darren Chester is tipped to move from the outer ministry back into cabinet, potentially taking emergency management from Littleproud.