Here is another state that if Trump wins, the next Democratic president will carry.
Aside from 2000 and 2004 where Gore and Kerry performed poorly in the south, when has GA been that far to the right? Prior to Bush it wasn't very red either. Democrats talk about GA and AZ like Republicans talk about MI and MN.
The two democratic Presidents before Obama were both Southerners, which is clear from their strength in states which would now be considered "hard R". GA, on the other hand, went from McCain+8 to Romney+8, even as the nation moved towards the Republicans. The Atlanta area, in particular, has trended D quickly.