Trump supporters will not change their opinion of the man will not change wall or no wall. They are not stupid.
No most are not stupid. They know the wall means the survival of the country. It’s not just about one man one president. It’s about the country. He’s the only one that has a chance to save it. And without the wall it is toast. You seem to think it is only about the one election, without the wall the next president will let the flood back in.