More than 18,000 people have been asked to explain why they apparently voted more than once at the federal election.

The calls come after David Leyonhjelm told Peta Credlin to "STFU" after she rejected reports Tony Abbott did a deal that would allow the firearm into the country. 

The government of Nauru has labelled the ABC "an embarrassment to journalism" following a Four Corners report on the island's regional processing system, accusing the broadcaster of racism, political activism and insulting the people of Nauru.

It has been 2916 days since controversial former state Labor minister Ian Macdonald issued China's state-owned Shenhua a licence to explore for coal in Australia's richest farming region, the Liverpool Plains, in return for a $300 million cash payment to the NSW government.

Michael Forst says he is "astonished" by measures heaping "enormous pressure" on public servants, whistleblowers and ordinary citizens.

Labor frontbencher Anthony Albanese has refused to endorse Kimberley Kitching for a plum Senate seat, placing him at loggerheads with Labor leader Bill Shorten.

The Federal Government's attempts to pass a pair of union-busting industrial laws has been sidetracked by claims it was prepared to horse-trade over Australia's strict gun laws, prompting a fierce political attack from Labor and criticism from former prime minister Tony Abbott.

New doubts raised about the effectiveness of the government's centrepiece climate policy.

Former prime minister Tony Abbott has joined Labor in pressuring Malcolm Turnbull over a possible weakening of Australia's gun laws.

• EXCLUSIVE

Australia is about to launch a fresh diplomatic drive to expose Japan's claim to kill whales in the name of science, but a threat of further international legal action appears to be on hold for now.

So what exactly do One Nation plan to do to 'make Australia great again'?

On Monday, the Royal Commission into the Protection and Detention of Children in the Northern Territory held a community meeting at Wurrumiyanga, the largest Tiwi Island settlement, and it was Sister Anne Gardiner who set the tone.

New Reserve Bank governor Philip Lowe has held out hope of further interest rate cuts, saying he needs to guard against inflation expectations falling too far.

Amnesty International official who travelled to Nauru says Australia should be held accountable for breaching the Convention Against Torture.

Greens leader Richard Di Natale has called on Malcolm Turnbull to stand up to his party's "right wing dinosaurs" and legalise marriage equality, warning Turnbull will lose the next election if he doesn't.

At least four Liberal MPs thrown out by voters at the election have picked up plum jobs as taxpayer-funded advisers to their former colleagues.

Ghazal and Jalil, Shadi, Mirza and Shahin, Firuz, Laleh and Nahal, and Amir, Yasmin and Darius have revealed their disturbing stories.

• EXCLUSIVE

Pauline Hanson says she is emboldened by the growing support for One Nation as it prepares to field candidates at the Western Australia and Queensland elections, arguing the party continues to confront issues the major parties won't touch.

'Noodle bowl' of agreements is difficult for business to navigate

• EXCLUSIVE

Victorian Labor senator Gavin Marshall has declared war on frontbench colleague Andrew Giles, revealing he plans to back a preselection challenge to the Scullin MP and accusing him of lying over a plot to remove his ally Kim Carr.

Testy officials from the Department of Prime Minister and Cabinet dismissed security experts' concerns about the use of WhatsApp.

Department moves to protect Border Force public servants' mental health.

Prime Minister Malcolm Turnbull has accused Labor of risking national security as it steps up its attack on Attorney-General George Brandis over his public brawl with the government's chief legal adviser.

Bob Day has made the shock announcement that he will resign from the Senate after his building company went into liquidation.

Former Coalition MP Wyatt Roy has been cleared of any wrongdoing after his trip to conflict-ridden Iraq, with the Australian Federal Police declining to investigate beyond a preliminary examination of publicly available information.

Labor Senator Penny Wong accused Stephen Parry of employing "a mate who lost his seat".

Pauline Hanson's One Nation party has quadrupled its primary vote since the July election, a new poll suggests, with their support in Queensland reaching 10 per cent.

• EXCLUSIVE

Malcolm Turnbull has been drawn into a deepening row between the country's two most senior lawyers after he was asked to confirm the Solicitor-General ticked off on a controversial terror bill.

Malcolm Turnbull dined with Rupert Murdoch's senior Australian editors in Canberra on Sunday.