Interestingly enough - Cooper's district actually trended Democrat. Clinton won it by 19 while Obama won it only by 12 in 2012 and 16 in 2008. Can we primary that guy yet or what?
As a resident of that district, I can tell you that there are a ton of suburban anti-Trump style rich Republicans in it that increased her margin. The Davidson County mayoral race was actually quite close last year, the closest a conservative has come to winning it in a long time. Jim Cooper also won by less than he did in 2012 or 2014. Either way, he will be gerrymandered out of a district in 2022 (I'm not sure why they didn't do it last time)!