Former attorney-general George Brandis has rubbished Peter Dutton's proposal to hold a referendum in order to deport criminal dual nationals, labelling it "as mad an idea as I have heard in a long time".
The opposition leader confirmed he would consider holding a national poll to change the constitution if elected at the coming federal election, after the High Court ruled that only judges, not politicians, could strip people of Australian citizenship.
Mr Dutton has previously criticised the government for spending hundreds of millions of dollars on the failed Voice referendum during a cost of living crisis, but defended his plan on the basis that the changes required constitutional change.