There are a group of Blairites who are trying to undermine Mr Corbyn
They do not belong in a Labour Party which elected Mr Corbyn with a record mandate. These people are a "third column" in the Labour Party and Mr Corbyn is wrong to expect them to change.
The Blairites are ambitious career politicians who see their hopes of personal advancement and their seat on the gravy train scuppered.

If they are unwilling to remove themselves. they will cause severe damage to the new style of politics which Mr Corbyn is promoting and if they win we shall find ourselves back in the tired old circus and the wealth gap will keep growing.