For reference:
In April (all votes), Fulton was 45%, Cobb 32% and Dekalb 23%.
In early vote, Fulton was 53%, Cobb 26% and Dekalb 21%.
Through today:
Cobb 11502 (16.5%)
DeKalb 17229 (24.8%)
Fulton 40828 (58.7%)
Total 69559
Not much change in proportions through today's update:
Cobb 12422 (16.5%)
DeKalb 18644 (24.7%)
Fulton 44397 (58.8%)
Total 75463
One factor may have been that Cobb had a favorite son in the first round but not in the second. If Judson Hill was focused on Cobb County and ginning up turnout there in the first round (a sensible decision, since he only had to beat Handel, not Ossoff, in the first round), the lack of his presence in the second round could be felt in terms of organization and enthusiasm there. Same for other regions with R candidates who lost, but Hill was the most regional of them and had little support outside of Cobb.
