There is not going to be any Biden in a general election. That's why the dems who see that are casting around trying to make someone else- think Buttigieg- appear to be moderate. That isnt going to work either, but it is their dilemma. The pubs have their problems with Trump, but things are a mess over in demville too- bigly. Every frigging one of the clowns is on record for supporting something that equates to open borders, for abortion even after birth- aka infanticide, and some form or medicare for all. No moderates in that bunch. Just because they need one, does not mean one of them is. Tulsi, I guess is moderate on a couple issues by dem standards but no one is seriously positioning her for the moderate-de jour when Biden tanks. Bootyplug and the media think he could be, this week anyway. He isn't, but they need him to be. Could be someone else next week. I guess they try their luck with Klobuchar sometimes too.
Bernies is not going to be the nominee but his supporters are die hard, which increases the chances that no one will get the magic number and the whole thing will shit the bed into a brokered convention. Biden has some die hard supporters too, certainly not even remotely all of them but enough who will want to dig their heels in after others have defected to warren. That too increases the chances of a brokered convention.
You do realize that you use every candidates's real name correctly but always find a butt joke for the name of the openly gay candidate.... just saying.