It is easy. The election is a referendum on Trump and what is perceived as his irascible demeanor. The issues do not matter except Orange Man Bad.
Let's assume for the sake of argument that's true (because it is.)
If I were President Trump, come tomorrow morning I'd remind the Never Trumper's that he's STILL their President and they can stick it right up their stupid liberal asses!
Give 'em hell Mr. President!