Florida polling shows Biden absolutely running away with it against the field (it includes everyone who has since dropped out):

realclearpolitics.com

Biden 61-12 over Sanders in the 3/4 poll. The poll immediately preceding that one (by same firm) indicated a 34-13 Biden advantage. It’s snowballing against Sanders.

There are no Michigan polls showing post-Super Tuesday action, so can’t begin to get sense of what the Super Tuesday results will do, but if it’s anything like Florida, then it’s all bad for Bernie.