Because, Dekker, much like your own Lunatic-in-Chief, there is a HUGE swath of the population that actually believe him.
No matter how many times you tell yourself, "C'mon, no one can be THAT stupid," the fact is that despite everything he's done that flies in the face of any common sense, that is amoral, unethical, unnecessarily cruel, that has hurt the very people who claim he's their savior, despite Coronavirus, despite heading into an economic crash the likes of which we've not seen in my lifetime, despite all of the prevention he completely FAILED TO DO, there's still better than an outside chance he'll win again in November.