Im assuming you aren't including the obvious things like murder and stuff like that. I dont think he has done tax evasion, I think he hasn't shown his taxes for 2 reasons, he isn't as rich as he wants people to think he is and now add in the fact its another way for him to stick it to the left and the media.
I actually think its most likely that Trump has had a girl get an abortion. He has been openly liberal for most of his career and the dude has been a rich playboy in NY for his entire life. I think the dude is not a good dude morally. But if being a good person morally was a key part in being president we wouldnt have had JFK as president and by all measures that dude was a great president. I dont look for the president for a moral guide, I have other people in my life for that, just put in good policies.
If an accusation of Trump raping a girl ended up being true, I would want him impeached. If it comes out Trump has been to Pedo island and is a Pedo I would want him impeached.
I think Trump has lived such a high profile life that most of his demons are already out there for the public. The dude is the definition of a rich NY scumbag. I accept that and if more stories come out of him being an asshole, I dont care because I already knew that. If it does come out that he is a major tax fraud, then yes he will lose my support. I dont see that happening though, because I think it would've already been found. I just think the dude is an asshole. For me its policy, keep making good policies and Im fine.