Well, they aren't supporting him now.
He has been lambasted by the ex-MPs who were in Westminster to clear their offices.
The whole party needs to be demolished and rebuilt so that it reflects the core voters, and has credible costed manifesto's rather than a billionaire wish list.
Labour will be in the political wilderness for a long time especially if BJ gets us out of the EU with what is looking increasingly like aclean break....well that is unless the EU capitulates.
They know that with a majority and a law which prevent further extensions, they will lose out if they do not get their act together.