Should Democrats target AZ and GA in 2020?
Both state trended Democratic despite Hillary being a terrible candidate.
In fact, AZ and GA were closer than IA and OH.
I think you're ignoring that Trump was also a poor candidate, especially for these two states that have large metro areas with a large suburban white population that will likely swing back to the GOP in 2020. Arizona is more promising for Democrats than Georgia.
A "poor candidate" doesn't crack the electoral walls in WI, MI, and PA. That's not the resume of a "poor candidate".
I agree that AZ is more promising than GA, but GA is increasing its black population at a rapid rate, and it's a more middle class black population that votes more often. It's white population is also changing, and becoming (slowly) more liberal, as white working professionals move into metro Atlanta.
You're right; While he was a poor candidate in my opinion, He did succeed in changing the electoral map which is a massive achievement.
Also, Georgia's white population isn't really getting more liberal.