Kamala Harris won the white vote in California in 2016, along with Hillary Clinton at the Presidential level.
That makes sense, given that Harris won the vast majority of California's counties. As to Georgia, isn't it possible that Zell Miller in 2000 won the white vote? He defeated Mack Mattingly by 20 points, got 58% of the vote, and won 144 of Georgia's 154 counties.
Oh yes, Miller definitely won the GA White vote in 2000. I forgot about that one since it was a special election. Nunn would have been the last in a regularly-scheduled election.