The reason Arizona was a red-leaning state was because of Maricopa county. In fact, Rs used to better there than they did statewide. The state outside of Maricopa county is only red enough to overcome Tuscon and Pima County by a small margin. If you were to remove Maricopa county, Trump only would have won the state by
%. Remove Maricopa and Pima and he only wins it by 17 points. For a Republican state that is incredibly weak.
Nevada without Clark and Washoe is Trump+39 for example.
If Rs ever want to win the state-even in a squeaker-they have to limit the loss in Maricopa to less than 2 pts. If Dems ever start winning Maricopa county by 5+ consistently its over.