The virtual debate, staged through separate video links to ensure safety amid the pandemic, was a chance for voters to get to grips with one of the most volatile and chaotic races in the nation.
Some 20 candidates are standing in a race which, as a special election, had no primary.
Loeffler, who was appointed to the seat in January following the resignation of Johnny Isakson, is having to fend off a fierce challenge from Doug Collins, an avidly Trump-supporting congressman.
The pair have been scrambling over each other in a rapid dash to the right, trying to outdo the other in their radical conservative credentials.
“You’ve attacked my hair, my makeup, how I talk, my clothes, where I’m from,” Loeffler said, adding: “I am the true conservative.
I don’t have to have a record I have to lie about,” the Gainesville Times reported.
Collins shot back: “I’ve never mentioned anything personally – her fixtures, hair or anything else. »