Also Strange how Ossoff is underperforming Biden
Perdue probably outperforms Trump. He is less divisive and thus will probably do better in the Atlanta suburbs.
People make jokes about it all the time but the fact is that Johnny Isakson far outperformed Trump in 2016 precisely because he did way better in the suburbs. Given Perdue's genericness, it's not hard to imagine him also doing so, though definitely not to the same degree.
This is true, but even Isakson did worse in 2016, both in the suburbs and in Georgia as a whole, then he had in 2010 and 2004. He only carried Gwinnett County with a plurality (and won by pluralities in Newton and Henry Counties), and won Cobb County by "only" 11 points, where he had won by 30 points six years previously. Given demographic trends since then, and Abrams' major gains in the 2018 midterms, I think even Isakson's 2016 performance would be impossible for Republicans to replicate now.