Just like Trump, he just abuses the holes in the rules that have never been fixed. Reagan was the first to do that large scale, but in reality nothing out of manners or some moral code was preventing things like that happening before, and as we currently see, the americans haven't fixed anything in the last decades - it rather seems many have forgotten more than they ever learned.
The US is a joke - we can see how much their constitution and democratic institutions are worth in reality. Outside of an outsized ego and megalomaniac tendencies, there's not much to see there.