Striking in Arizona is the result in Maricopa County, home to more than half the state’s likely
voters. In Maricopa’s cities, Biden leads by 61-35 percent; in the county but outside of its cities it’s a dead even 47-47 percent. It’s also a near-even race in and around Tucson, which Clinton
won in 2016. Those compare with 65 percent for Trump in the rest of the state.
Both those numbers should raise huge red flags. As it happens, AZ is a state where weighting by county is viable and makes sense.
I wonder what they define as "cities" in Maricopa County. Mesa or Chandler are cities but would usually be considered suburbs of Phoenix, even though Mesa has a population of more than 500,000.
