The High Court of Australia has granted One Nation leader Pauline Hanson special leave to appeal a finding that she racially vilified Greens senator Mehreen Faruqi, opening a free-speech fight over the Racial Discrimination Act that will now be tested at the nation's highest court.

The High Court of Australia building in Canberra, November 2016. Photo: Thennicke / Wikimedia Commons, CC BY-SA 4.0, modified