He gets away with everything because he controls the media through his billionaire friends - both traditional media and social media (Truth Social, which he owns, has little reach). Likewise, it is not him who controls people like Clarence Thomas for example (that would be billionaire Harlon Crow). So I'd say he is only untouchable because he acts in the interests of the elite. If he were to turn against them, things would very quickly look very differently.
I think it's a foregone conclusion that the elite pushed him into the highest political office precisely because he is such a disgusting, perverted scumbag. That means there is more than enough dirt on him to bring him down. With Hitler, it was different.
Of course, it is always possible that he will use ICE, which is obviously a secret police force, against the elite, but I think it is rather unlikely that he actually has enough power to do so.