Most of his followers are imbeciles. Most of the rest believe that their wealth will insulate them from the negative impacts.

Worse problems are in the pipeline. For instance, tariffs and especially flipflopping on tariffs will make many people around the world decide that selling things in America is simply unfeasible because they can't even be sure that the rules will stay the same between when an item ships and when it arrives days or months later.

Smart people can look at things like this, quickly extrapolate likely problems from it, and get upset immediately. Dumb people have to wait until, for instance, prices skyrocket and/or items disappear from shelves. Thus the first hit is from smart people who never voted for him or were quickly alerted to his uselessness. The second will be when his majority base notices problems they care about. But even then, there is an insulating factor, because some of them will blame someone else for those problems -- likely Democrats and immigrants because that's the party line.