I have seen this picture of here on MANY of the lib sites which looks to be a picture snapped mid gesture that is not so flattering. (the press phottogtraphers use cameras that can take multiple pictures a second) So why not use a picture of a neutral expression at the very least?
They love to use this "Photo Trick" on people they don't like, remeber all the unflatytering mid word gesture or speacking pictuires they took of George Bush during his prwesidency. Or any of the other people on the right they take pictures of and use the most unflattering one they can find in their little news stories...