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/118802" allowfullscreen></iframe> Political Correspondent Jonathan Karl pointed at the pledge as being a potential cause for the fiscal cliff. "The pledge is the biggest obstacle to any deal that would raise taxes," he told "World News" views Nov. 26.