I still believe there is a sizable percentage of people who vote for Dems who don't identify with the far left nuts who run the Dem Party and who also control academia, the entertainment industry, and the media.
They support a few Dem Party tenets (abortion "rights"...unions..."fair" wages" etc., but they're not totally on the liberal crazy train.
I don't believe these people want a split. They do most of the same things as most Republican conservatives do, but they still vote for The Crazy Party i.e. Dems.
I have a son in law who works for a bank who is religious, a boy scout troop leader, loves guns and hunting, doesn't do drugs, and is a devoted Democrat. Why he votes for Dems I do not know.
His wife, my stepdaughter, is a big time liberal, but both are socially conservative.
I would bet there are many more millions of Dem voters like them. They think they're voting for the party that wants a nicer America rather than one that is eagerly trying to tear down everything that made America great.