Maybe I'm naive but I'm not totally convinced we've lost working-class Rust Belt whites forever, or even for more than a campaign cycle. Reagan had them in the 80s, Bill won them back in the 90s, Bush won them back in 2000, Obama won them back in '08. Is it wrong to assume these are not devoted partisans and they are enough of them who are malleable enough that a Democrat in 2020 or '24 can bring them back into the fold next time?
I think the problem with the Biden fantasy scenarios is that it depends on a completely different primary process. Biden made the decision not to run just a little over a year ago, six months after Hillary had already declared she was running. I don't know that he would've had the resources and campaign infrastructure in place to mount a serious bid, and his early polling numbers at the time did not show him beating Hillary or Bernie (iirc, Obama had been subtly discouraging Biden to run by having aides provide these numbers to Biden).
If Biden announced in early 2015 that he was going to run, maybe Hillary would've sat out, maybe she wouldn't, but Biden would've had plenty of time to build a support network. Given the limited resources he had when he decided against running -- by which point Bernie had a more robust campaign operation going -- I don't know if he could've broken through in the primary, even if maybe he would've won the GE.
I think the problem with the Biden fantasy scenarios is that it depends on a completely different primary process. Biden made the decision not to run just a little over a year ago, six months after Hillary had already declared she was running. I don't know that he would've had the resources and campaign infrastructure in place to mount a serious bid, and his early polling numbers at the time did not show him beating Hillary or Bernie (iirc, Obama had been subtly discouraging Biden to run by having aides provide these numbers to Biden).
If Biden announced in early 2015 that he was going to run, maybe Hillary would've sat out, maybe she wouldn't, but Biden would've had plenty of time to build a support network. Given the limited resources he had when he decided against running -- by which point Bernie had a more robust campaign operation going -- I don't know if he could've broken through in the primary, even if maybe he would've won the GE.