Trump is 70, Clinton is 68, and both are well past the US retirement age. You should fully expect that until the boomer generation dies major candidates will just get older (look at Mccain, and Romney was also past retirement age when he ran for president (65). Obama was fairly unique in being so young at just 46. The trend is retirees run for president, and retirees vote for them.
Even the house and senate reflect these trends. The average age of a senator went from ~53 in 1980 to ~63 today. The house went from 49 to 57. For over a century the average was stagnant between 50 and 55 and only now is it going off the chart.
These people simply do not retire. They will die in office with dementia but they are certainly not stepping down and their voting base will have nothing less than their own in office until they are all in the ground.
It is a sad state of affairs, a lot of similar things happen in companies where it's hard to advance as positions of authority are locked out by people who have held it since they were given the opportunity at 30.
It's an unfortunate side effect of increased healthcare and life expectancy.
Politics in the US is definitely an old boys club (just look at all the political families) fortunately other countries aren't as bad.
Even the house and senate reflect these trends. The average age of a senator went from ~53 in 1980 to ~63 today. The house went from 49 to 57. For over a century the average was stagnant between 50 and 55 and only now is it going off the chart.
These people simply do not retire. They will die in office with dementia but they are certainly not stepping down and their voting base will have nothing less than their own in office until they are all in the ground.