Some people voted for him because of that.
He was found guilty on 34 counts of paying a pornstar, Many people see it a persecution not prosecution because he doesn't even know what he's guilty of. The judge allowed jurors to decide on whatever secondary charge they wanted and not even have to tell him what it is. They didn't even have to agree on a single crime, as long as they all found a one.
He denied he raped that woman (who doesn't even remember what year she was raped in) so she sued him for defamation. Jury found him not guilty of rape, but guilty of sexual assault. The judge reversed the decision saying that sexual assault is basically rape so he awarded her millions of dollars.
In both cases laws were changed specifically so he could be charged. Alvin Bragg even ran for district attorney on a platform of getting Trump.
Donald Trump ran his 2016 campaign on getting Hillary, but never actually did it. The Democrats actually prosecuted him by any means necessary.