After more than 60 years of alliance after the defeat of the general election, the National Party and the Liberal Party separated.

Australia's National Party has been separated from its conservative coalition partners for more than 60 years, with the Liberal Party suffering huge losses in this month's national elections.

"It's time to take a break," state leader David Littleproud told reporters Tuesday.

The split shows pressure on the Australian Conservative Party, which was backed by voters against U.S. President Donald Trump's policies after Anthony Albanese center-left Labor won a historic second term in the May 3 election.

Under a long-term partnership between state and federal politics, liberals and national alliances have power in government, and nationals represent broadly the interests of rural communities and liberals in competing for city seats.

Littleproud quoted policy differences as saying: "We will not sign a coalition agreement with the Liberals after this election."

Liberal leader Sussan Ley, who held the position last week, has promised to revisit all policies after election losses. She said Tuesday she was disappointed with the decision of the nationals, which came after they sought specific commitments.

“As the largest non-government party, the Liberal Party will form a formal opposition,” she added.

The Liberals dropped to 28 out of 150 seats in the House, with the worst result being that Labor increased from 77 to 94 seats, earning its largest majority ever in the election. The Kuomintang retained 15 seats.

The Liberal Party has lost key urban seats, and has lost key seats in support of gender equality and action on climate change.

Ley, a former inland pilot with three finance degrees, was elected the party’s first female leader after opposition leader Peter Dutton took the seat in the election.

“She is the leader who needs to rebuild the Liberal Party; they are on a journey of rediscovery, which will give them the opportunity to do that,” LittleProud said.

He said the Nationals remain committed to more coalition talks before the next election to "open the door" but would safeguard the interests of rural Australia.

The Nationals failed to make a commitment from Ley that her party would continue to develop policies on elections that support the introduction of nuclear power and hope to suppress market forces in Australia's mega supermarkets and better telecommunications in the inland areas.

Australia has the largest uranium reserves in the world, but nuclear energy is prohibited.

Littleproud said nuclear power is needed because the transfer of coal from coal to "renewable energy only" in Australia under the Labor government is unreliable.

He said wind turbines “are tearing up our landscape, they are tearing up your food security”.

AGFORCE CEO Michael Guerin, representing farmers in Queensland, said the urban-rural divide worsened.

"Maybe we saw this in the political forum," he said, adding that both liberals and nationals need to be rebuilt.

Labor Finance Minister Jim Chalmers said the opposition's division was a "nuclear collapse" and the Liberals' existence when parliament sat down was "almost not much" than the 12 cross seats of the independent party and minors.