I don’t think Sanders will drop out, period. I think it’s basically 2008 over again, but will finish with Clinton probably 250-300 delegates ahead (and she will clinch a delegate majority excluding Supers, which Obama failed to do.)
I will say this–after 3/15 we’re right at about 50% of total delegates allocated, if she pushes him to needing 58-60% of the remaining vote after that then the simple reality is only an imbecile will think he can still win. Including Sanders being an imbecile if he thinks he can still win.
At that point, while I have no problem with Bernie staying in, I have a serious problem with him continuing to call Hillary a corporate shill, to say that he’s the only one representing real Americans and etc–basically anything that creates the perception that there is no real difference between Hillary and Republicans. Because that can be truly damaging to the party in a way that hurts in November–and serves no purpose, because at that point Sanders has no real win possibility left, so he’d be damaging the party out of spite. I’d honestly say if I was a Democratic power broker I’d consider having a private, and threatening conversation with Sanders about that behavior. Maybe things like potentially no longer being allowed to caucus with the Democrats (which means he would lose seniority and committee positions across the board), that’s a nuclear option since it could cost the Democrats Senate control in a tight Senate, but might be worth it to stop Sanders from blowing up the part in November. I’d also say it may be time to start leaking all the negative shit from Sander’s past, like his inappropriate articles for leftist magazines and how he’s a laze-about who never worked a real job until he got into government, and how “government” is only vaguely a real job anyway when you’re talking elected officials.