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/554759" allowfullscreen></iframe> Two days before a presidential debate in which the nominees’ microphones will controversially be muted at times, President Trump had a small foretaste on Tuesday night when he lost sound during a campaign rally in Erie, Pennsylvania.