Accused of colluding to mutually protect lower house members who might yet have a constitutional problem with dual citizenship, Malcolm Turnbull and Opposition Leader Bill Shorten approached week’s end in a blazing standoff over how to address it. Each now faces the real prospect of colleagues being referred to the High Court as possibly dual citizens in breach of section 44 of the constitution.

When it was suggested on the Nine Network’s Today show that he was “under the pump”, the prime minister responded: “I’m a good man in a crisis.”

But another round of adjudication on citizenship could lead to more dangerous byelections in February or March, seriously threatening his one-seat majority. Karen Middleton reports.

Plus: Paul Bongiorno on Manus and marriage equality, and Bill Wilkie on the precedents to Stop Adani activism.

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The Saturday Paper