Bernie's not dead, but he has to somehow survive next week to a draw to prevent it from getting out of hand. It arguably get even harder after that, but one thing at a time.
Are there any more scheduled debates yet? I honestly don't know. They'd have to been within the next week or so for it to potentially change anything.
Oh, he is.
Super Tuesday makes it very clear that Sanders hasn't managed to expand his coalition at all over 2016. To be fair, IIRC he lost a share of the vote pretty much everywhere. So expecting *better* results than 2016 doesn't make much sense at all.
Next Week is:
Idaho: 20 delegates (Sanders state, '16)
Michigan: 125 delegates (Sanders state, '16)
Mississippi: 36 delegates (Clinton state, '16)
Missouri: 68 delegates (Clinton state, '16)
North Dakota: 14 delegates (Sanders '16)
Washington: 89 delegates (Sanders '16)
Then March 17:
Arizona: 67 delegates (Clinton)
Florida: 219 delegates (Clinton)
Illinois: 155 delegates (Clinton)
Ohio: 136 delegates (Clinton)
Then March 24:
Georgia: 105 delegates (Clinton)
March 29:
Puerto Rico: 51 delegates (Clinton)
This is a murderer's row of states with large delegate counts that are going to be rather lopsided losses. No way to make this up. The story post Super Tuesday is that Earned Media is worth a hell of a lot, and a string of lopsided wins in swing states for Biden is going to be a LOT of earned media Sanders has no answer for. It will get worse after this.