Even if Matt Canavan survives, his immediate absence from cabinet is a blow to Barnaby Joyce.
Matt Canavan was seemingly able to obtain Italian citizenship without being born or spending any time in Italy.
At the heart of the current controversy is that the senators were either ignorant of their second nationality or believed themselves to have lost it.
Matt Canavan has resigned as the minister for resources and northern Australia after being told by the Italian embassy that he is an Italian citizen.
The Greens are in shock after their co-deputy leader, Scott Ludlam, discovered he is ineligible to sit in federal parliament because he has dual New Zealand citizenship.
Given the Turnbull government only has a one-seat majority in the lower house, the immediate stakes of the challenge to David Gillespie's eligibility are as high as they could possibly be.
The Mabo decision changed Australia's concept of land ownership. It was a divisive yet important step toward recognising Indigenous rights and establishing native title.
The key takeaway from the Bob Day case is that courts interpret the eligibility requirements for election strictly.
The rationale for banning foreign donations is to stop the threat of overseas interests undermining Australian democracy.
After all of the legal controversies of the past year we have ended up in essentially the same position – the Senate will include a One Nation senator from Western Australia, but not Rod Culleton.
Women’s exclusion from legal and political power for much of last century makes Susan Kiefel’s appointment all the more significant.
Given that a hard Brexit currently looks to be the most likely outcome, the British people need to be given another say.
How the Article 50 judgment kicked a hornets' nest.
Changes to Senate voting laws and the particular case of Senator Bob Day make for an unprecedented constitutional tangle, and one that will change the make-up of the Senate.
Historically, Australia’s broader policy approach to war crimes and war criminals has lacked a clear and coherent foundation.
Labor senator Doug Cameron told Q&A the High Court had decided that the unions and business are entitled to fund political parties. Is that true?
We don’t have to love a process like a plebiscite, or think it ideal, to make the most of it.
What is meant by a 'foreign' political donation? And why should such donations be better regulated?
There are a few necessary ingredients for the effective regulation of any political donations system.
Ministers of religion who support marriage equality would be able to challenge the Marriage Act in the High Court. They would stand a good chance of winning.