Why does the Iowa caucus matter? #cnn #news CNN 0 165 01.15 05:48 https://www.youtube.com/watch?v=DD6O1ZCnlMQ + 11 https://www.youtube.com/feeds/videos.xml?channel_id=UCupvZG-5ko_eiXAup… + 10 Why does the Iowa caucus matter? #cnn #news