There has been a general population movement from northern states to the sun belt (partly due to the availability of air conditioning and mosquito control) with many high tech industries moving there to take advantage of lower labour and other costs. The growth of Latino/Hispanic and other minority populations has also increased diversity, especially in more urban and suburban areas. I sometimes get the impression the deep south is changing more than the mid west bible and rust beltsM

Index of Frank's Diaries

Metro ATL is about half the state population.  It's not the comically large share that (say) Vegas is in Nevada, but it's quite large as a share.

It also has far fewer non-college whites than a lot of southern states, and it's much more urban/suburban.

The real story, if there winds up being one, will probably be Biden eating into the northern suburbs (Gwinnett County, Cobb County, etc).  It's the "college-educated white people -- especially women -- don't like Trump" story.  Clinton carried those counties pretty narrowly.  Stacey Abrams then won them soundly.  I figure Biden's got to hit about 60% in Gwinnett to have a real shot.

Again, that's all a big if.  Gun to my head, I'd still probably bet on Trump holding on to it, but it should be pretty close.

Be nice to America. Or we'll bring democracy to your country.