I was told that Kemp's vulnerability is "overblown," though. Even if the anti-Kemp vote is seriously split in the first round, it’s hard to see (and has been the entire year) how Kemp wins the runoff against even a semi-competent Republican.
I would certainly give Perdue an edge in the primary (and he’s a better bet for the GE as well, but that’s still going to be a tough race for the GOP).
Agreed that this is going to be a tough race for the GOP. Not only is the state getting less and less friendly to them by the month, it's also one of the only states in which the Democratic Party knows how to campaign. Warnock and especially Abrams are good, and bad national environment or not, they're going to be tough to beat.