The former adviser's comments follow a leaked report into the Labour's election defeat that appeared to remove blame from Mr Corbyn.
Mr McTernan has said the Labour conference in Brighton is the "most disastrous and badly managed conferences" that he has ever been to..
John McTernan has said Jeremy Corbyn 'did not take his moment' to make a stand on the Brexit debate after the 2017 election.
A former Labour adviser has said party leader Jeremy Corbyn’s handling of alleged antisemitism in the party shows “cowardice.”
Former advisor to Tony Blair, John McTernan, says Labour has had an influx of people from the left
Former advisor John McTernan says anyone who thinks Kezia Dugdale should be with constituents has 'no sense of humour and no heart either'
John McTernan says the EU knows it is holding all the cards
John McTernan came onto the show to discuss the former PM's return to political activity
Tony Blair is getting ready to return to politics, according to The Sunday Times – does the Labour party need him?
Tony Blair's former political secretary laid into the leader of the Labour Party
John McTernan said Labour party members 'don't know what they're doing' and Corbyn is simply making a power grab by including them in Shadow Cabinet selection
Tony Blair's former advisor John McTernan says Labour leader should have just said sorry
Tony Blairs director of political operations explains why he thinks Labour won't win an election under Jeremy Corbyn
Labour political adviser John McTernan reveals his views on Chilcot