Trump has been accused of rape at least two times. Once by his wife Ivana:


"According to Ivana, Trump was driven to freakish rage by a failed anti-baldness surgery - a so-called 'scalp reduction'. According to her deposition, Trump flew into a rage, attacked her, held her down and began pulling hair out of her head to mimic his pain and then forcibly penetrated her."


http://talkingpointsmemo.com/edblog/time-to-press-donald-on-raping-his-wife


Jill Harth, a makeup artist, accused Trump of attempted rape in a 1997 lawsuit, said that Trump grabbed her sexually.


“He pushed me up against the wall, and had his hands all over me and tried to get up my dress again,” Harth said, “and I had to physically say: ‘What are you doing? Stop it.’ It was a shocking thing to have him do this because he knew I was with George, he knew they were in the next room."


https://www.theguardian.com/us-news/2016/jul/20/donald-trump-sexual-assault-allegations-jill-harth-interview