He's the most cogent voice in the country on environmentalism, its nexis with the Bush "kill-government" agenda, and the massive, practical harm the administration has done in a short time by abrogating environmental regulations.
In speech today before the Sierra Club, he added some non-environment-related themes: centralized corporate control of the media, and the character of Donald Rumsfeld, among others.
I think we need to add him to the list of people who are the face of the national Democratic Party -- somewhere, somehow -- and soon.
Consider these comments, apparently somewhat extemporized (or recorded and transcribed):