Interestingly enough most of the R and D trending districts are in the same state:
D trending districts:
AZ(3 trending D districts)
AZ-03
AZ-07
AZ-09
CA(10 Trending D Districts)
CA-17
CA-19
CA-27
CA-32
CA-33
CA-34
CA-38
CA-46
CA-47
CA-51
FL (2 D trending Districts)
FL-26
FL-27
GA(2 trending D districts)
GA-06
GA-07
TX(5 trending D Districts)
TX-02
TX-07
TX-22
TX-29
TX-32
VA(3 trending D districts)
VA-08
VA-10
VA-11
Republicans:
Illinois(2 trending R districts)
IL-12
IL-15
Indiana(3 trending R districts)
IN-04
IN-06
IN-08
Michigan(2 trending R districts)
MI-04
MI-10
Minnesota(2 trending R districts)
MN-07
MN-08
Missouri(2 trending R districts)
MO-03
MO-08
Pennsylvania(3 trending R districts)
PA-05
PA-09
PA-17
Ohio(2 R trending districts)
OH-06
OH-07
Wisconsin(3 trending R districts)
WI-03
WI-07
WI-08
West Virginia(3 trending R districts)
WV-01
WV-02
WV-03
The rest of R trending districts that aren't in the same state: IA-04, KY-05, and ND-AL.
surprised AZ-06 isn't on the list.