Knuth to Step Down in 2009?

Say it ain't so Kevin. I think most people would agree that Knuth has done a good job as the Democratic party chairman and I was surprised to read that he will not seek another term:

I can’t think of too many good reasons to want to be chair,” he said.

In fact, Knuth said he won’t be seeking re-election after his term expires at the end of 2009. Knuth said he is the fifth Democratic chair to serve during Shine’s tenure.

So fill us in Kevin. Why the plans to step down?