They get to cheat and you don't get to complain. For Trump, the cheating is the thrill.
Most people will look at this and think that any US win will be tainted (yes I know FIFA has never been pure). For Trump, any US win will be HIS win because he made it happen.
Trump doesn't care if the USA wins. He cares that he gets to show who is boss and that any win will actually be because of him.
And, yes, he'll steal the trophy if given the chance.