If you look at Trump's fiscal policy, he's not that much different from Democrats. Just like Democrats often, he will also enrich the wealthy while not really doing anything for the poor. We will at least have our big government programs though, which keeps Democratic voters appeased, I suppose.
Honestly, the biggest single groups of voters Trump should appeal to are labor Democrats, Southern/Midwestern Democrats (big on conservative social values, somewhat parochial, but like government helping out economically), and social values Republicans who aren't as nearly as scrupulous about fiscal policy as they are about what I would call loud "In Your Face American Triumphalism," where just the mere illusion of being better than everyone else is all that really matters.