The only county I could find with a white bare majority is Baldwin County, GA that went for Hillary 49-48. Not exactly 90 percent and probably just means there is enough white Democrats to tip the county to Hillary. It is located in the poorest part of the state which may explain its lean to Dems.
The county is still majority white and whites tend to be overrepresented in relation to their population. This same county voted for Johnny Isakson 52-45 and for their Republican State Representative 54-46* so Hillary outpaced the downballot Dems in competitive races. Did the black voters ignore the other contests? Was there a quiet set of white Never-Trumpers in this county? I don't know. LOL.
*There was no Incumbent in this race.
