The Constitution needs to be amended to make the MAXIMUM age for a US Congressman or Senator 65 years old. That will get rid of the often seen legislator who probably doesn’t have the mental capability to scratch their asses; from voting on legislation that affects US ALL.
By that time, their staff and lobbyists tell them how to vote anyway, and they probably do well to not piss themselves, or remember what state or district they’re from.
I suppose term limits would fix most of this.
Denying by age is unconstitutional.