A few months after Hillary Clinton took over as U.S. secretary of state in 2009, a longtime associate with connections to the Clinton Foundation insisted that her senior aides give a job to an unidentified male associate. “Important to take care of [name redacted],” Douglas Band, President Bill Clinton’s former right-hand man, wrote to Clinton aides Huma Abedin, Cheryl Mills, and Nora Toiv in an April 22, 2009, email. “We have all had him on our radar,” Abedin responded. “Personnel has been sending him options.” The subject line on the email read “A favor…” The email exchanged was uncovered by...