There were two "scandals" at her "school for girls" in South Africa.
Oprah Winfrey's school in child abuse scandal – https://www.telegraph.co.uk/news/uknews/1568410/Oprah-Winfreys-school-in-child-abuse-scandal.html
Oprah Winfrey school in South Africa faces second sex scandal – https://www.telegraph.co.uk/news/worldnews/africaandindianocean/southafrica/5082517/Oprah-Winfrey-school-in-South-Africa-faces-second-sex-scandal.html
Now you know part of the reason why she won't run for President.