Not really unless she can sway critical voters in the countryside.
Less than 10% of people in Arizona live in rural areas so idk what you mean by "countryside".
I don't think Warren wins in AZ in a close election. She doesn't seem to do very well with hispanics (Look at the recent PPP polls), and she may have trouble with a couple of socially liberal fiscal moderates/conservatives rich subarbanites of which there are a fair amount of in Arizona.It is an Atlas tradition to comically overrate the number of "rural" voters in general in order to create a clean *urban-rural divide*. Anyway, of course Warren COULD win Arizona ... the reason Arizona is becoming more competitive has at least as much to do with Hispanic voters than it does White Republicans defecting, and there is no reason to believe that Warren wouldn't be at least as good with that demographic as Clinton was.