To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Share Embed Share URL Video File Node URL Embed Code <iframe title="MRC TV video player" width="640" height="360" src="https://www.mrctv.org/embed/2814" allowfullscreen></iframe> Former presidential advisor David Gergen explained the difference between the two presidential candidates during an appearance on CNN "Issue #1" June 5, 2008.
