Ex-Chief of Staff didn't want Biden to drop out of race. Hear if he th… CNN 0 89 08.15 11:15 https://www.youtube.com/watch?v=T7BzghqybUQ + 25 https://www.youtube.com/feeds/videos.xml?channel_id=UCupvZG-5ko_eiXAup… + 11 Ex-Chief of Staff didn't want Biden to drop out of race. Hear if he thinks that was wrong