That will include Trump.
He's 78 and is the oldest president-elect in history. With his energy it's really hard to believe he's that old. He goes non-stop and has quite a rigorous schedule.
I propose that you cannot run for office after the age of 80, but would be allowed to finish out your term once you turn 80.
Then there's the issue of cognitive ability -- some people can maintain, other's can't. Mitch, Nancy, and Joe all have displayed a decline; especially in Joe's case. IMHO Congress needs to do the country a favor and mandate that they step down. Falling down stairs, unable to speak coherently or forget their whereabouts is indicative of needing to retire.