He needs to be white.
And Christian, but not too serious about it.
He needs to be an experienced con artist with a long history of breaching contracts.
It helps if he sexually assaults women and brags about it.
He should promote division along racial and religious lines.
He should insult our allies and be a sycophant of dictators.
He should be an avid consumer of conspiracy theories and an in-the-bubble devotee of never, ever listening to opposing opinion. Or facts.
Above all, he should take credit for things he had nothing to do with, and dodge responsibility for his mistakes.