Ms. DeVos’s appointment of Candice E. Jackson to the department’s Office for Civil Rights has been among the most hotly disputed. Ms. Jackson is perhaps best known for her high-profile involvement in attacks against Hillary Clinton during the presidential campaign, in which she elevated women who had accused former President Bill Clinton of sexual assault or harassment, while denouncing women who accused Mr. Trump of the same. Ms. Jackson will oversee some of the issues the Trump administration has signaled it would step back from — such as the treatment of lesbian, gay, bisexual and transgender students, and investigations of sexual assaults on campus. What is less known about Ms. Jackson is that she is a sexual assault survivor, and has been married to her wife for more than a decade.