Jack Turner of the Jack & Jill Politics Blog, has done a three-part series outlining why he cannot support Hillary Clinton for the Democratic Nomination. These are well thought out posts.
Here are the links:
Why I Don't Support Clinton - Part 1 - Abandoning Friends and Principles
Why I Don't Support Clinton - Part 2 - No War for Polls
Why I Don't Support Clinton - Part 3 of 3 - Two Clintons Too Many
I make no bones about it that I'm a Barack Obama supporter. But, even if he weren't in the race, I'm also clear that I'm not voting for Hillary Clinton, and believe she's the only way that the GOP can win in 2008.