Forget your MAGA-pilled relatives, they're gone. There’s two completely different kinds of people you probably know one of who are persuadable:
Normie pro-business upper-middle-class men who think Trump will be better for their personal finances, and leftists convinced some light fascism will move America towards socialism.
Both are underestimating just how bad Trump would be for their interests. Call them and talk them off the ledge.