He ought to take stock and realise that he hinders his party, and as it stands, if that is the case, he hinders his country.
I can understand why he might not want to be seen as ready to resign right now at this emotive time , but frankly I hope he is considering it for the near future. Perhaps '..after reflection, the fuller picture, allow the party to move forward with fresh vision' - etc, etc - the usual kind of spiel...