The debate between Sanders and Biden starts in a half hour (8 pm eastern time). From what I can tell, it is broadcast only by CNN, and can be accessed in various formats from this page.
https://www.cnn.com/2020/03/15/politics/how-to-watch-democratic-debate/index.html https://www.cnn.com/politics/live-news/2020-democratic-debate-live-updates/index.html top of page, there is a short leader featuring Johnny Carson
Well, my streaming isn’t all that fast so I didn’t hear much but shouting whenever the internet would kick in.
Looks like Uncle Joe has this out already.