He is a master salesperson. He can sell anything.
No. He is a ham handed salesperson. He is only able to sell his dumber followers. I include in this group the racists and xenophobes as well as the anti abortion crowd and the fundamentalist Christians bent on spurring the second coming.
Now I will certainly admit that there are some very smart people who support Trump. None of them do it because they are fooled. They are about evenly divided between those who got a lot of money from his election and those who simply want to break things.
I met a very smart guy the other day who is a total outlier. His opinion is that we are about to face the end of labor as we know it. He believes that the deficits are irrelevant in the face of that. Simply put, there is no one who will be required to foot the bill. He made a very convincing argument.