Barnaby Joyce
Reelected Nationals' leader Barnaby Joyce (Image: AAP/Mick Tsikas)

Barnaby Joyce has signalled a new period of instability within the Morrison government and further undermining of climate action by taking back the leadership of the parliamentary National Party from Michael McCormack in a partyroom ballot this morning.

McCormack left the meeting saying that the result was democracy in action.

The former -- and now reelected -- leader left the job, and the deputy prime ministership, in February 2018 after detailed allegations of sexual harassment emerged about the high-profile figure. Those allegations have never been resolved, despite a Nationals investigation of them. He denies them. The complainant, who wished the matter to remain confidential, was outed by party figures to News Corp at the time.