While Trump’s personal life is certainly not a model technically he has not violated any of the sheva mitzvot presuming that he avoided taxes and did not evade them. The great Judge Learned Hand (yes, that was really his name) said that there is not even a patriotic duty to refrain from tax avoidance. Being nasty and aggressive might even be an advantage in dealing with rogue and semi-rogue regimes.
As has been mentioned, in a complex world the choice is often between bad and worse. It is almost never black and white. While it is, of course, no comparison, many concentration camp officers were polite and cultured. One even addressed older prisoners by the formal German “Sie”. Oskar Schindler, on the other hand, was a crook and unfaithful to his wife. That’s the way it goes sometimes.