Harassment in US Congress

Even powerful Congress female members were sexually harassed and it is wrong. Why might it take so long? https://www.youtube.com/watch?v=2OOypPxY2oM It goes on in government work place as in other industries. https://www.youtube.com/watch?v=4nipd8GjJYo What defines harassment under the law? https://www.youtube.com/watch?v=PZOf92bIGM4