President of the United States is one of the single most meaningful, stressful and taxing positions a person can assume. Age and decline of mental and physical faculties are a *REAL* concern here.
If Joe wins the nom. His running mate will be important because of his age. Biden really does have an age problem, and obviously, that's not going to go away.
Joe himself knows - he has a long and complicated senate record, but it's mostly a good one. But, of Harris' assault... There's really no way anyone could argue that he shouldn't have seen it coming. And that's what's surprising : he just sat there and got fucking owned. I can't remember the last time I watched someone of Biden's stature get clobbered like that. It's not really Biden's record on race that was his problem last night; it's that he didn't look like the feisty, unadulterated, "I'm a lawyer but could have been a construction worker," Scranton tough guy that we're all used to seeing. He looked like he was walking around trying to find someone to play bridge with.
The danger that the Democrats face is having to deal with a party that is fractured along the lines of identity politics.
Harris most certainly stood out in the debates. She stood out by insinuating that the party's dominant front-runner may have a racist bone in his body after all. Whether she said those words or meant that doesn't matter - she made Joe Biden, the party's front runner, look weak and put him on the defensive just by having to talk about the issue. To be sure, Biden probably has other problems than just fending off charges of sympathizing with segregationists but that's not the point. The point is, hopefully winning the democratic nomination will not involve beating each other up over who's the real champion for social justice, and that's not a fight Democrats want to carry into the general election. They will get fucking destroyed if that is their cause.
Maybe Biden was more focused on what he thought Sanders would bring? If so he prepped for the wrong fight. She wanted to hit Biden and get a viral debating moment and she got it but frankly without a clear policy of her own, the whole thing is empty political posturing. School segregation still happens to some degree in some states but Harris doesn't appear to have any plan on what she wants to do about it.