@evan It's not really clear that Mr. Trump believes in anything other than self-aggrandizement. But to the degree a set of policies may be called "Trumpism", Sen. Vance makes the case for them more intelligently than Mr. Trump does: protectionism, tighter immigration, a more Jacksonian foreign policy, hostility towards élites.
I linked to an interview with Sen. Vance a few days ago: https://cosocial.ca/@mpjgregoire/112793658334462068