from Talking Points Memo:

In all seriousness, I think the real story here continues to be that things are so bad at the White House, the level of denial and secrets to be kept, the self-bamboozlement and bad-faith so profound, that they just can't manage to bring in any new blood.

With Rumsfeld, or any other cabinet secretary, there's a related problem -- the importance of which has, I think, not been fully appreciated or aired. If Rumsfeld goes, you need to nominate someone else and get them through a senate confirmation. That means an open airing of the disaster of this administration's national security policy. Every particular; all about Iraq. Think how much they don't want that ...

Finally, can they find anyone on the outside who wants in? This, remember, seems to be the problem with Treasury Secretary Snow. He has already, in essence, been fired. But they can't come up with anyone crazy enough to take the job.