There is almost never evidence in sexual assault cases. Nobody is going to see it happening and unless it is reported immediately there isn't going to be physical evidence. It's usually going to be the man's word versus the woman's word, which is why so many men get away with it, often repeatedly. In Trump's case, it is virtually impossible for me to believe that he has not sexually assaulted women. It fact, he has bragged about doing so. I think even most of his supporters know he has done stuff although I think a lot of them are OK with it because "they probably deserved it".