This is the main problem with the post-Clinton Democratic Party. Bill told Hillary she "forgot about Bubba." It wasn't just Hillary.
Dems should have looked on at the horror of the Trump phenomenon and realized that THEY helped create the conditions for his success. Rural America used to be Dem leaning. Then Dems fell in love with Wall Street and free trade (along with their embrace of civil rights), and their platform gave rural and small town Americans no reason to consider voting for them.
Now, I don't want to completely exonerate Bill Clinton. He set the Dems on the path to where they are with Third Way politics. Was it necessary to win some elections as the Reagan Era reached its Zenith? Sure. But they should not have completely jettisoned the underpinnings of the New Deal coalition.
Y'all shouldn't be so quick to tear down Mayor Pete, though. He seems to have the ability to fight effectively, and, no matter whether the political winds continue to favor an expansion of the progressive wing of the party, the Dems remain the far, far lesser of two evils.