Stating the obvious time: The R demographic skews older

From an article from KTVK/KPHO, re-published from Stacker -

Counties with the most seniors in Arizona

Seniors will comprise more than 20% of U.S. residents in 2030, up from 15% in 2020.

By 2034, older adults will outnumber children, according to Census Bureau projections. Across the U.S., 52 million Americans are 65 years or older, according to the U.S. Census Bureau, and a quarter of them live in just three states: California, Florida, and Texas. By comparison, North Dakota, South Dakota, Vermont, Wyoming, and Alaska each have fewer than 150,000 senior residents.

[snip]

Stacker compiled a list of counties with the most seniors in Arizona using data from the U.S. Census Bureau. Counties are ranked by the highest percentage of residents 65 years or older according to 2020 5-year estimates. Keep reading to find out which counties have the most seniors in Arizona.

I noticed that some of the highest-ranked counties tended to be red counties.

(Ranks and senior citizen data from the article; voter registration [as of August 2022] and voting history data from the Arizona Secretary of State's office)

Most counties in AZ voted the way their registration advantage indicated they would (i.e. - D counties voted for Biden; R counties voted for Cheeto).  There were two exceptions to this - D-leaning Yuma County voted for Cheeto while R-leaning Maricopa County voted for Biden.  Both voting margins were close and the registration advantages are also close.

It isn't a coincidence that the six counties in AZ with the highest percentage of senior citizens are also R-leaning.