You would need to show that Trump invited Bannon into the White House because of his white nationalist views, and not because of his abilities in other areas. W

You would need to show that Trump invited Bannon into the White House because of his white nationalist views, and not because of his abilities in other areas. Which I don't think you can do. Also, if Steve Bannon is a white nationalist, it seems weird that Trump would support him, considering that presumably makes him want to get rid of parts of Trump's own family(Ivanka/Jared and their kids).