DTG says in the Art of the Deal:
" One thing I’ve learned about the press is that they’re always hungry for a good story, and the more sensational the better. It’s in the nature of the job, and I understand that. The point is that if you are a little different, or a little outrageous, or if you do things that are bold or controversial, the press is going to write about you. I’ve always done things a little differently, I don’t mind controversy, and my deals tend to be somewhat ambitious. Also, I achieved a lot when I was very young, and I chose to live in a certain style. The result is that the press has always wanted to write about me."
and also "The final key to the way I promote is bravado. I play to people’s fantasies. People may not always think big themselves, but they can still get very excited by those who do. That’s why a little hyperbole never hurts. People want to believe that something is the biggest and the greatest and the most spectacular. I call it truthful hyperbole. It’s an innocent form of exaggeration— and a very effective form of promotion."
So now you know what the wall on the border is. Do you think he will actually try to build an actual wall?