Here is the reality check:
Rates of dementia and mild cognitive impairment rise sharply with age: 3% of people between 65 and 69 have dementia, rising to 35% for people age 90 and over.
Around 30% of all males 83 and older have dementia.
Yet, it was only one group of ableist white supremacists who supported a sitting president credibly considered to have dementia.
Whether Woodrow Wilson or Ronald Reagan, both were voted in largely by conservative white people.