That's an assumption not a fact as incumbents have lost before, there's no way to know how a new candidate with Biden's blessing would have done since we are all dealing in hypothetical. This is politics situations vary and it's not like the old assumptions work anymore especially after Trump.
- - - Updated - - -
Now this is just sad, if you are trying to be witty you could at least google to use the right terms in my case you could say cry (QQ) more Biden is it accept it or have a intellectual retort and add that in order to be smart and witty. This is neither take note for next time or get angry and ignore it.