INB4 DaleCooper says the obvious answer, stop alienating rural America
I mean, he's not wrong when he says that.
He is. Doing better in rural areas would flip so many states before Nebraska that it would remain incredibly Republican-leaning relative to the nation. You might as well ask how Democrats can win a 40-state landslide.
The last Democratic presidential candidate to win here was LBJ (and before him, Roosevelt). Downballot wins were only possible because of greater ticket-splitting, and the decline of ticket-splitting everywhere cannot be explained away as a function of Democrats alienating rural America.
Just because it is rural and white does not mean it is ancestrally Democratic.