Labor is again calling for deputy opposition leader Julie Bishop to resign or be sacked over her handling of the on-going AWU scandal.
Ms Bishop on Tuesday said she coincidentally met Mr Blewitt in Melbourne on Friday for about 10 minutes and discussed the ongoing furore over Julia Gillard's work as a lawyer almost 20 years ago.
But Fairfax Media said the Liberal MP also spoke with the self-confessed fraudster by phone last Wednesday while she was in Perth.
'Yesterday ... Julie Bishop indicated quite clearly, as a result of a lot of questioning, that she had but one conversation with Mr Blewitt,' Dr Emerson told reporters in Canberra on Wednesday.
'If those media reports are correct, then Julie Bishop has out and out lied.
'She should therefore resign or be sacked.'
Labor backbencher Steve Gibbons on Wednesday morning controversially tweeted: 'Libs are led by a gutless douchebag and a narcissistic bimbo who aren't fit to be MPs let alone PM and Deputy. Both should be sacked.'
He later apologised for using the term 'bimbo' and replaced it with 'fool'.
Labor backbencher Yvette D'Ath said the deputy opposition leader had called on Ms Gillard to recall events from more than 17 years ago 'when Julie Bishop herself can't even recall what she did last week'.
'This is disgusting, it's been an appalling attack on the prime minister,' she told reporters.
Fellow backbencher Amanda Rishworth was singing from the same song sheet on Wednesday.
'This is the day Julie Bishop has to resign,' Ms Rishworth told reporters.
'Her credibility has been left in tatters. Julie Bishop has been lying to the Australian people.'