Bidden announced trillions to be used to economic recovery and green deal!, page-24

https://ballotpedia.org/List_of_United_States_Senators_from_Georgia

There is the history. The last 10-20 years isn't history. Not that I like using Wikipedia as a source ... but it's quick
"For over a century, the Democratic Party dominated Georgia state and local politics with a membership largely consisting of conservative Southern Democrats. From 1872 to 2002, the Democratic Party controlled the governorship, both houses of the state legislature, and most statewide offices."

Believe whatever you wish ... I lived in the USA for almost 20 yrs (1990 -2007) mostly TX. Plenty of travel across the SW of the country. Demographics change over time, which made the TX voting interesting ... all those CAs relocating.

Your initial reference was to the Senate ... NOT Presidential races ...

What's important is how this win affects NVX long term (plenty more elections to be held this decade).