The poll in NC with Biden leading 48/44 is nearly identical to the last CBS/YouGov poll done in NC in 2016 on Oct 26-28 which had Clinton up 48-45, what is different is Trump was up 22% with whites in that poll vs 17% now, but he is only doing 1% worse overall, I would guess due to him not not doing as badly with non-whites.
He has 5% among blacks in the NC poll
Blacks are not the only non-whites in NC, 10% of NC's electorate is not white or black, as I've said he is doing 5% worse with whites in this poll compared to the Oct 26-28 YouGov poll but only 1% worse overall so he must be doing better with non-whites.
The more likely explanations are that this poll’s turnout model is wrong, is of registered voters rather than likely voters, or (most likely) the difference is due to the margin of error.
