Ageist as fuck.
Also…not sure how many people today know this but the longest ever serving president was confined to a wheelchair. Unassisted mobility isn’t a requirement to run this country.
To be fair, FDR was in no shape to be President at the end. But it's an interesting comparison, as he only ran for a 3rd and 4th term because he saw the existential threat of WWII and felt the US needed continuity of (his) leadership.
(screenshot from Wikipedia)