PN:-
CDS didn't use the Maar programme as a platform, Marr did that.
Absolutely agree. We've now grown to accept that our National Broadcaster has a political agenda all of its own, despite being funded by a tax levied on all its licence payers, irrespective of their individual beliefs.
I suspect that their agenda is to undermine Corbyn at every opportunity, and to encourage the Labour Party to unseat him as leader in favour of one that it considers is more electable. The Marr interview was merely one manifestation of that agenda, and any effect it might have on CDS's future, good or bad, is immaterial to it.
That is the elephant in the room, the BBC's constant interference in the national political debate, rather than any professional facts produced by CDS.