I would say that 40 years is more then long enough.
Please people, we need term limits.
Serving in Congress is suppose to be something that you do for a very few years and then GO BACK HOME and live under the laws that you proposed.
That is not happening and we are not the better for it.
Term limits are no substitute for an informed electorate. If term limits worked, California would have a responsible legislature. Instead, we have a revolving door for nameless future lobbyists.