It's a bit late for them to be switching candidates now, they need at least some of the left-wing base to vote for them in order to even have a hypothetical chance of beating Trump and that's going to be hard enough to accomplish with Biden for all sorts of reasons, it will be practically impossible if they go with Cuomo because he never even went through the primary. I can practically hear the "Selected, not elected!" chants now.The left has realized that Biden is... a problem. But they sure as hell ain't gonna let Bernie have it. So they're thinking forward to how they're gonna get out of this mess.