Problem for Bernie is he is already on record at the debates as stating he will support the nominee whoever he/she is. I suspect the DNC will buy Bernie off AGAIN, and try to shame his supporters into voting for a non-Sanders nominee as otherwise they are helping to elect TRUMP....
Either way Bernie supporters need to realize Bernie would loss against TRUMP. I know many like to think Bernie could bet TRUMP but he just doesn't have the same support as TRUMP. None of their candidates do. This is why the media isn't promoting the small democrat rallies nor are they commenting on viewership of the debates that few are watching. TRUMP has keep his base engaged through his rallies since he was elected, they will show up to vote. The same really can't be said for democrats who don't have a candidate that can walk into being the nominee with a large base.