The Dems haven't learned their lesson, but then again there are the people who will "vote blue no matter who" even if the candidate is terrible.
For me, Sanders 2016 run was a confirmation of how bad the process is. The duopoly is pretty bad with the Dems being open about how bad the electoral process is.
Not only will they push a candidate, they will push a candidate who hasn't gone through the process of campaigning for office. But that is because Kamala Harris is an awful candidate. I was surprised they picked her to be veep in 2020. Even more surprised when Biden-Harris won the election.
Anyway, Sky New Australia has a good piece on how bad she is and how she is dividing the party, but that began the moment Hilary Clinton ran for president in 2008. I have a long piece on why I don't like the Democrats.
And the Republicans are pretty much the same thing. It takes culture war issues to give the appearance of a difference.
As I said, get ready for Trump II.