In a Yahoo! News video, Deb Callahan, president of the League of Conservation Voters gives George W. Bush an 'F' for his environmental record - the first 'F' in the organization's 34 year history. The interviewer asks her if her organization is politically tied to the let, and interestingly, Callahan claims that 20% - 23% of her endorsements are Republican candidates. She goes on to say that John Kerry, if elected, will be the most environmentally friendly president in one hundred years. Watch the video here.