At some point he’ll get too big for his boots, and Trump will turn on him. It will be interesting to see how that turns out. Probably Trumpists will take Trump’s side, and concoct some reason to dislike Vance (again). That’s the real power of characters like Trump, Putin etc. They have some instinct for instilling blind loyalty in certain types of people.
Seems the liberal world order is in the early stages of facing its first really major challenge in the last 80 years. It will be interesting (in the ‘living in interesting times’ sense) to see what comes out of the clash. I suppose a likely scenario would be a return to national mythologising, as with Putin currently. The breaking down of those national myths has left a bit of a vacuum I suppose, and the vast bulk of people don’t seem to be able to cope without their stories. What seems likely is a return to a use up everything you can, now, to get rich, now, and screw the future phase.
What seems certain in any case is a continuation and worsening of the political conflict in the US. If Trump gets in, which seems likely, he’ll use the malleable Supreme Court to limit all powers except his own. That is what many Trumpists want, essentially, the power to make people they don’t like illegal in some sense or other. Then they can shake their heads over the folly of people who break the law, as if those laws had always existed.