Of course it isn't an interview
performance so it's misleading to think of it as being one; just a cynical attempt at getting a soundbite across. Very common as well.
A mixture of AV and the unions.
Union
members. Of course the actual reason is that he ran a terrible campaign and didn't order some of his more unpopular supporters to shut up when he should have done. I like David Miliband (even went to see him speak a couple of months ago), but he's got a bad habit of alienating people without realising that he's doing it.