Sen. Bernie Sanders, I-Vt., has been a loud and constant voice for socialist policies throughout his 30 years in Washington, D.C., a self-proclaimed champion of the collective good. But in researching my new book, "Profiles in Corruption: Abuse of Power by America’s Political Elite," I discovered that while Sanders may talk about the common good, his public service has made him and his family quite wealthy. Perhaps no one has benefited more from Sanders’s career in politics than his wife Jane. When Bernie was first elected mayor of Burlington, Vermont, he appointed his then-girlfriend, Jane Driscoll, to head his administration’s...