In a campaign where some of the polling has been spectacularly wrong, David Herle offers an appraisal of what he has termed the biggest crisis in the polling business since "Dewey defeats Truman" in 1948. He credits the unpredictability of the campaign to, among other things, new media platforms such as YouTube and the "Obama effect."
David Herle Examines Inaccuracy of US Primary Polling in Policy Options article 
