The House is controlled by the R gerrymandering in the Deep South. Whereas at presidential level, and senate elections, dynamics are different, and Latino coalition is much more important in states like CO, NV & Pa where the senate map is a reflection of the presidential map, in 2016.
Term limits are up for GOP give in MI, FL, NV & NM; Dems are expected to win IL & MD in 2018, we will see the R gerrymandering in Deep South in House start to come to an end, by 2022.
MI, WI, OH, and PA aren't in the Deep South. I will give you that VA and NC are in the South but Deep South no? They are Mid-Atlantic Southern States. By the way, the Dems gerrymandered-lite Illinois just like the Republican gerrymandered-lite Michigan.
TN could have easily been gerrymandered to 8-1 GOP (the 5th is D+5, completely surrounded by R+1X districts), but it was left at 7-2 (unless Cooper retires in a wave year, perhaps).