I think this is much more of a “anybody but Hillary” phenomenon than a “I love Bernie” phenomenon.
I wouldn’t be so sure about that. The dems have moved WAY left of Hillary’s positions and Sanders’ positions are (and have been) WAY left. It’s possible that he’s interpreting it as his time to make a serious run. We know The media will not go after him in a serious enough way to throw him off his message.
The world has gone just crazy enough where he could pull it off.
Can you imagine a Presidential debate between Sanders and Cruz?