Politics live with Labor promising 'anything could happen' as citizenship saga heats up

Okay, end of the day for me. What happened?

• Labor leader Bill Shorten has released documents showing he was not a British citizen when he was elected in 2007;
• the move neutralises the Turnbull government's attack on Mr Shorten and has led to further calls for MPs under a citizenship cloud to do the same;
• Labor continued to attack Prime Minister Malcolm Turnbull for not requiring Deputy Prime Minister Barnaby Joyce to stand aside while his case is heard;
• Mr Joyce said - again - he will remain in the job; and
• National Party senator Fiona Nash and independent senator Nick Xenophon were referred to the High Court this morning. 

My thanks to Andrew Meares and Alex Ellinghausen for their magical work and to you for reading and commenting.

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Alex, Andrew and I will be back in the morning. Until then, good evening.

A reminder the High Court will hear a challenge to the government's same-sex marriage postal vote in Melbourne tomorrow (and Wednesday).

The document has been cut and pasted so Ms Sudmalis's address is not public.

But it is supposed to show "non acquisition" as opposed to renunciation because Ms Sudmalis says she was never a British citizen.

Liberal MP Ann Sudmalis has tweeted this document.

"I go as hard as anyone on Bill Shorten on policy matters," Senator Cormann says.

"I never believed he was a dual citizen."

(Not looking at you Messrs Abbott and Turnbull.)

Acting Special Minister of State Mathias Cormann says he agrees with Mr Shorten: "We shouldn't go after each other the way we have."

"You are validly elected unless someone is able to contest your eligibility through the High Court sitting as the Court of Disputed Returns," Senator Cormann tells Sky News.

"None of us have the authority to make these judgements."

A canny observer of politics has reminded me Liberal MP Ann Sudmalis promised to stop fudging and release the documents proving she renounced her British citizenship when Mr Shorten did.

Over to you Ms Sudamalis.

Which, of course, will only encourage the Greens in their quest for an audit of everyone's citizenship.

This has been the line all along - from the Coalition and Labor - that MPs should not have to prove their innocence if there is no reasonable suggestion they were in the wrong.

But Labor has clearly decided it doesn't want its attack lines to be muddied by questions about Opposition Leader Bill Shorten's citizenship.

It has also - deftly - ensured the pressure has now increased on MPs to produce their documentation.

He says MPs should not have to provide evidence they have done nothing wrong when there is no compelling evidence to suggest they have.

"I suspect the Prime Minister and his colleagues knew the claim to be completely false," Mr Shorten says.

"I ask the Prime Minister to do the right thing, do the honest thing, be the strong leader you say you are and make the Deputy Prime Minister stand aside."

Opposition Leader Bill Shorten wants to make a personal explanation.

He tables documents showing he renounced his British citizenship prior to his election in 2007.

"I offer this proof to the house today to put an end to these baseless allegations, not reward them," he says.

But then it finishes.

Question time continues with a question about energy prices.

The government eventually wins by one vote.

As the opposition points out:

And we move to an attempt to suspend standing orders.

The motion calls on Prime Minister Malcolm Turnbull to stand aside Deputy Prime Minister Barnaby Joyce.

The opposition persists.

"We haven't heard anything about the first ever national strategy to protect Australians from terrorism in crowded places," Mr Turnbull says.

"We haven't heard any support at all for our drug testing trials."

But we have heard "snide remarks", the Prime Minister adds.

Deputy opposition leader Tanya Plibersek takes up the case.

She would like a list of everything My Joyce has done since it was revealed he might be a dual citizen and was referred to the High Court.

Mr Turnbull says Mr Joyce is "absolutely qualified" to sit in the house and so the premise of her question is incorrect.

(Gee, it's going to be embarrassing if the High Court decides otherwise.)

Mr Turnbull flips to birther mode and the backbench perks up.

"The question Australians are asking is: what has he got to hide?" Mr Turnbull says.

Opposition Leader Bill Shorten asks why Mr Turnbull told question time last month the High Court would find Mr Joyce was not ineligible.

Mr Turnbull says "the basis of our very strong confidence" is "based on the advice of the Solicitor-General".

The opposition tries again on whether other MPs have citizenship problems.

"There has been a welter of speculation about many members," Mr Turnbull says, "and the opposition takes the view that they are under no obligation to demonstrate that they do not hold dual citizenship."

Mr Turnbull says he has not asked the Solicitor-General for advice on any MPs except those whose cases will be heard by the High Court.