I'd also mention that the Dems are profoundly unpopular right now. I can't tell you many Trump voters I've talked to the past few weeks that have a short circuit when I tell them that I hate the Dems too, probably more than they do. Many Trump voters (and non-voters for that matter) are as Anti-Dem as they are Pro-Trump, if not moreso.

I'm not sure how to convince these people to vote for a Democrat in the short term. Even if in the long term the goal is a new party or a radical restructuring of the current one.