As I have mentioned a few times before, I am old. I have seen things that many have not. One thing I have seen over the years, this nation has been moving politically, socially and morally to the left for the last three decades, at least. I would expect it is more like 4 decades.
It is somewhat sporadic. Sometimes it creeps; sometimes it leaps, as with Obama and Old Joe.
Do you suppose that the nation as a whole has gotten tired of moving left and that is the reason the dems lost. If it is, you will never convince them of it. As far as they are concerned, we have not moved nearly far enough to the left. I suspect that that will never, ever happen.