Actually there needs to be an overhaul of the system, either age limit on senate, house and presidency which I agree with, or an independent medical examiner/s verifying they are mentally capable of carrying out duties (this wouldn’t work and is too open to corruption).
Just don’t let people serve after 60. It even works to reduce generational thinking that infects government policy.
So you have a problem with ageism? So then why is president restricted to being above 35? Oh right, now you have an issue yeah? There needs to be age limits, because society goes forwards in progress, not backwards, not because of your insecurities around your own age. Don’t worry, you’ll never be president.