...I hope he won't, and I like to think there is a good chance that he will not for several reasons.
1: In several of the states he swung his approval rating has dropped. If the Blue Wall is repaired that makes his job harder
2: It's rare for presidents these days to fully retain the states they won previously. H.W Bush lost a number of states he (and Reagan) had won, Clinton lost Montana and Georgia, Bush lost New Hampshire even as he gained Iowa and New Mexico, and Obama lost North Carolina, Indiana, and 1 Nebraska vote.
3: Voter apathy on the D side will decrease so fewer people should have a tantrum and not vote in protest.
Now let's ask ourselves this: why couldn't Biden win?
Hillary, in case you aren't aware, and Sanders too, have had a long history of being bashed, smacked, and mud swung by the Republicans. Their names had baggage even before 2016.
Joe Biden on the other hand, doesn't have nearly as much issue on his end. He's competent, he's a known name, and he has the potential to balance the Democratic party's two ends.
The Democrats are a big tent with three distinct wings to it: the Blue Dogs like Manchin, the for lack of a better term 'moderate/normal/etc' Democrats like Biden, and the Berniecrats like Warren. While this is required to balance out things as Democrats are not a homologous hive mind like 97% of Republicans, that means a Democrat leader needs to be left enough to be acceptable to most Berniecrats yet not so far left the Blue Dogs aren't up for him. While I personally don't like the Blue Dogs, I am aware that they are needed in an Electoral College system.
In my eye, Joe Biden could in fact be such a candidate.
Now to the talk about Democrats and moving farther left: I am personally in favor of it, but what I am not is the insistence people have against other Democrats, especially the leaders.
Cuomo, I mean what is wrong with the guy from a Left perspective? He isn't against Weed, he's pro LGBT, helped prisoners get voting rights back, and passed gun control laws. The recent NRA financial concerns are fairly tied to his legislation. He's hardly lacking.
Then there is Pelosi, who people seem to think is some sort of enemy of leftism. Do people think she's a Blue Dog? She's not....at all. I mean I wouldn't call her a Berniecrat, but she's fairly left.
I swear, there are people who want everyone on their side to be either Warren, or Tom Cotton. Look, do I particularly like Blue Dog Democrats?
No, but I know they are necessary.
Do I think Republicans are good people?
Not really, and that includes my own mother and her parents.
Would I prefer a permanent Democrat supermajority in the national government who would push the faces of Republican state congressmen in whenever they do something stupid like Religious Liberty laws, protecting statues of traitorous Confederates, or support refuge takeovers? Yes, I would love to see them disciplined like dogs that pee in the house, shoving their faces into it and telling them 'bad', on public television if possible.
"No supporting terrorists. No supporting traitors who were greater enemies than Al-Queda (I live near New York City and have a Southern mother so let me repeat myself: Confederate Troops were far worse threats to America than any terrorist that flies a single plane into a building. ). Behave like a good human being.'
However I am aware that isn't how things work, and that compromise is needed. I am not someone who would be utterly unhappy to see laws passed where people go 'Okay this bill will give tax cuts to renewable energy and freeze new regulations on Coal and Oil for a year', and both sides can get something. Compromise is nearly extinct these days because Republicans have replaced a number of moderates on both sides with Tea Party maniacs who've hijacked their party.
Republicans see compromise as a dirty word, and Democrats aren't given room to argue. The GOP is a party that wouldn't even consider a quite moderate judge Obama offered up, even as people got on Obama's case for 'nominating a Republican'.
Both sides have damages, I will not pretend that the DNC behaved rosily. However compared to the G.O.P, the Democrats are functional as something other than a mindless mob of deplorables.