According to Wiki, GA didn’t elect a Republican U.S. Senator until 2003. Before that, since 1852 all were Dems. The retiring Sen. Johnny Isakson is only the 3rd R in history. Didn’t realize the uphill battle Rs face.
There were a couple in the 80’s and 90’s (Coverdell and Mattingly).
Also, GA Dems like Zell Miller and Max Cleland were to the right of pretty much all of the current GOP Senators.