You're a map nerd, veen. You can get their data. Cross-check it for general population shift.
I'll bet they're discovering that more journalists live in blue counties because more people live in blue counties. The "bubble" didn't account for the fact that Trump could lose by 3m votes and still win the electoral college because if you're doing a blind phone poll, and the majority of people live in cities, the majority response in your poll is not going to be a rural one.