One good thing about having Biden as the presumptive nominee right now... [View all]
...is that he's pretty much universally known. With the media attention decidedly off the 2020 race, had we nominated anyone other than Biden at this point, we'd be losing crucial time building up a positive, solid narrative about our candidate.
People pretty much know Joe. It's why I think he's been able to sustain his lead vs Trump in the polls despite seeing much less TV time. A more unknown candidate might be able to, too, with how Trump has handled all this but I don't think it's near the sure thing since, in times of crisis, it's normal to look for a stable voice - but more importantly, a familiar voice and name.
An unknown voice, no matter how competent, may have been completely drown out by this. Even more, it's almost as if we don't need Biden to prove his competence. Fair or not, his name, the association with being Obama's VP, tells us of that competence so he really doesn't need to sell the idea he's competent to a vast majority of this country like other candidates would unfortunately have to do.