I may be completely wrong about this, but I see his willingness to stand up for his beliefs in the face of their being unpopular as potentially being the flip side of the same stubbornness that makes Bush such a disaster. A good President should be able to work effectively with Congress, and I'm not sure Kucinich is capable of that. Of course, I don't think there's a chance in hell of his getting the nomination, so the question is moot.