David Littleproud has fought off a challenge from Matt Canavan to remain Nationals Leader.

Kevin Hogan was elected his deputy and Bridget McKenzie as leader in the Senate.

The vote took place as newly-minted MP for Parkes, Jamie Chaffey, entered the scene as one of nine National Party members in the House of Representatives.

Senate positions are expected to take another week or three to be finalised.

"It's a great honour to be leader again," Littleproud said after the announcement.

"We set the tone on The Voice, Nuclear Energy, and our party room will meet again on Policy.

"Cost of living and petrol prices will remain high but we still fight for regional people and farmers,’’ he said.

New Federal Member for Parkes Jamie Chaffey arrived in Canberra on the back of a resounding electoral win, replacing retiring veteran MP Mark Coulton and entered unknown territory going into his first day.

Shifting electoral sands saw swings in several booths but with 63.2 % to 36.75 Parkes still remains one of the safest seats for the Nationals.

But it’s a long way from his days as mayor of Gunnedah with a leadership challenge on against party boss David Littleproud by Senator Matt Canavan who said before his challenge "the party has deep soul searching to do."

"Our renewable strategy, our energy system, our net zero policy is completely stuffed. We need to dump it. We need to get back delivering cheap prices."

Party leader David Littleproud had welcomed the challenge saying, "It's good for democracy and it's good Matt is having a go, it's what makes our party unique."

"I am proud of my legacy over the last 3 years," he told reporters. "Returning all our House of Representative members."

Earlier Australian Prime Minister announced his reshuffled Cabinet with Tasmanian MP Julie Collins remaining as Agriculture Minister, Fisheries and Forestry and Murray Watt to Environment and Water.

Regional MP Susan Ley looks likely to be the first regional Liberal Leader since former Prime Minister Malcolm Fraser when the Party room meets Tuesday but she has rivals Shadow Treasurer Angus Taylor as opponent and also Victorian MP Tim Wilson.