'red' states, from my quick and informal survey, with few exceptions, IMHO.
Seemed to be a pattern here where most of the fleeing (non-youth populations) populations are also fleeing red states.
Pure chance? I think not, since red states tend to not have high tax bases thus unable or not wanting to offer services to their instate residents, whereas the non-red states offer more services to their residents (and are able to pay for it w/ the higher taxes). Since non-red states have more services, their urban areas are more robust, thus more able to attract more incoming people of all ages, who want these services.
The unfortunate thing is that property taxes are increasing, in some of these non-red states, thus causing hardships among those on fixed incomes, lower incomes, forcing some to move/downsize/etc. A shame really, and some states do recognize this, and do offer some sort of help to their seniors, to help them financially in handling costs, such as high property taxes, etc. (not enough though).