I've been in Sanders groups since 2015. It's a mess. A big chunk of the quality people have left. The ones remaining post stupid stuff they can't back up. Coupled with that you have Dems trying to take over the discussion which doesn't pan out well. They are still angry & resentful. You can't have a decent discussion with them. Bernie has no chance of winning in 2020. The day he bent his knee to Hillary Clinton is the day he lost any power that he had.