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This article in Psychology Today is relevant:
Behind the Veil: Inside the Mind of Men "That Abuse"
The article largely addresses domestic abuse in the home by men against women (mostly spouses) but the underlying symptoms of abusers manifest themselves in the work place as well. I will extract one paragraph:
"Men that are abuse are very clever, smart, and extremely charming. Most of these men have a personality that draws people in because of their level of charm this is part of their art to deceive and manipulate. This is why often times when a victim does report an assault she is not easily believed because people usually say “not him, he is so nice’ “you are so lucky”, All of this plays into his because if he gets people outside of the home to buy into his deceit the victim has little if no support. Most batterers are seen as “Dr. Jekyll and Mr. Hyde" because of the stark contrast in their public and private selves."
While many "white men in power" can be tagged as sexual harassers, both at home and the work place, I would not attach that as a stereotype of these particular men. The problems goes beyond just this demographic.