Biden is looking shaky. Buttigieg is doing better than expected. I am hoping for Warren, but she is also looking shaky. At the end of the day I would take any of them over Trump.
Biden is banking on SC carrying him. May or may not pan out, depends if his black support holds up.
Buttigieg only did well in the most whitebread states. He should fall apart in short order and probably be done by Super Tuesday. At least, I hope so. Only Bloomberg is more detestable (but still better than Trump). Well, no. Tulsi is worse. But she's done.
Warren is okay, as long as her supporters don't give in to the "oops, IA and NH were bad, better switch teams!" hysteria (which is largely being fueled by Bernie Bros trying to undermine her support). Her strategy is pretty hyper-focused like she is on everything, and she's not sweating. I won't start worrying unless after Super Tuesday.