I think folks undersell Trump's intention to deliver. Just, to him, there's no objective reality outside of the message and the public reaction.

So he says "We'll build a wall!", then throws up a few miles of fencing, then takes some photos and says "We built the wall!", and people believe him?

That's job done.

Sure, there are a lot of interests around him, but I honestly don't think he's playing a master plan. He just lives inside messaging.