I missed this earlier, but the indefatigable John Davenport had an Op-Ed published in the August 15 issue of the Star-Ledger (Newark, New Jersey): “Americans do not want a gerontocracy.” Following the argument of his Democracy Amendments, John makes the case for a constitutional amendment for age limits for office:
It is thus a safe bet that at least three-quarters of American adults would support a constitutional amendment to set a 75 as a maximum age, even if some would prefer a lower number. That could be enough to get such an amendment ratified if it ever reached state capitols or state ratifying conventions. It would mean that no president could be inaugurated later than a day shy of their 72nd birthday.