Opposition Leader Anthony Albanese says Barnaby Joyce has learnt nothing from his mistakes after he backed Christian Porter to make a future political comeback.
Mr Porter resigned as industry minister on Sunday after revealing some of his legal fees for his defamation case against the ABC were paid through a blind trust.
But Mr Albanese said the acting prime minister's comments showed a lack of judgement.
"Barnaby Joyce just shows that, once again, a reminder that he has no integrity, that he's someone who shouldn't be in a position of being acting prime minister," he told reporters in Sydney on Tuesday.
"If this is his attitude, he has learnt nothing from his own mistakes."
