It occurs to me that our current president has engaged in a rather large number of actions that are unprecedented by any other president, as well as some only rarely happening and not for a long time, many of which for nearly all other politicians would make them viewed as simply unacceptable for being a president. However, with him, there have been so many that people simply ignore most of them as being, “Oh well, there goes Trump again being himself.”
First of all, I do not have a full list of his norm-shattering precedents. In googling I saw an article that proclaimed he had violated 20 “presidential norms.” But it was behind a firewall. And even though these may have been norms, it may be that other presidents violated at least some of them. Anyway, here goes a partial list.
The first president to be accused of violating the emoluments clause of the Constitution. Actually, there are two such clauses, the more famous one involving foreigners buying off a president, and then a domestic one as well. He has been accused of violating both of them on numerous occasions, although never formally convicted of any, with a couple of law cases in court, mostly involving just the Trump Hotel in Washington. But the list of likely violations is long and involves many properties and forms, with at least 22 foreign nations reputedly involved. The funny thing is that just because something is forbidden in the Constitution does not immediately make it specifically against the law. In any case, it remains that somehow no other president has even been accused of violating either of these clauses, but Trump is pretty clearly massively guilty of actually violating both of them blatantly and numerous times, with only the mildest outcry even from his critics.
He is the first president to have been legally charged with engaging in racial discrimination. This would have been in 1973 right after he began working for his father’s real estate business. He was not found officially guilty but had an out of court settlement in which he was ordered to stop doing what he had been doing. As it was, the Justice Dept later accused him of doing exactly that, returning to his previous racially discriminatory practices, after which he seems to have more or less stopped. Of course there are past presidents with much worse race relations records than his, such as outright owning slaves as did most of the Founding Fathers from the South. But in those days what they did was legal, if immoral.