I wouldn't know where to start. Maybe the electoral college and that nobody updated this in centuries. Makes it borderline undemocratic IMO. Especially the winner-takes-it-all formula that makes you have exactly 2 parties, with none of them really incentivised to do what the citizens want. At least on a national level. And the people can choose to either vote for one of them, whether they like them or not, or throw away their vote.
And the next thing are maybe the people themselves. I can't imagine how half a population would like a convicted criminal, who'd like to make everything more expensive for them and doesn't like democracy (which is kinda something the USA is proud of, historically) and would like to get rid of it. Which is completely detrimental to how and why the entire country was founded. And I mean you kind of have to be a racist yourself to like other fascists/racists? Or have some pretty severe issues in your life. I can imagine like 20-30% of racists around, or people who've been fooled by some charismatic character. But not half.