Step 0. Talk to a Trump supporter you know. If you don’t know one, start talking to the people around you. Make your way to the nearest patch of civilization and engage a human being.
Is that concrete enough for you? Are you aware that people have different situations, beliefs, and values, and cannot all be algorithmically engaged as if they were a computer program? Do your own conversations proceed via a finite, procedural list of “actionable steps”, or are they a bit more organic than that?