There probably is someone that can out do him in the Republican Party. There are a lot of racist people in the corn fields of America. Did you think it all ended with Trumpty Dumpty? I am sure the racists can vote for some one less volatile or worse than him. Believe me - this country never ceases to achieve this.
The trick is that it has to be tied to someone with perceived success. There's a massive swath of people that believe all success is divinely ordained and morally unimpeachable, and all poverty or struggle is likewise justified by the actions of the person experiencing those things (including themselves most of the time).
Without the veneer of wealth and success, a person will not be taken seriously by the lower classes that burn with envy, racism, and other ignorance-based prejudices.
But boy, oh boy, will they listen to a white person talk about how smart they are and demonstrate it with all their opulence that could only be earned by being very smart!
The bigger the con, the more zealously they believe it, too, hence our present circumstances.