What can the Democrats do about their 80/20 Dilemma?

Democrats are currently following the dumbest strategy in politics. That is, Democrats are taking the 20% side of every 80/20 issue in America.

Scott Jennings pointed out what he called Trump’s "superpower:" Find a bunch of 80/20 issues, get on the 80 side and watch his enemies jump gleefully on the 20 side, and find themselves with a 31% approval rating.