What number Secretary of State had a famous email server controversy?
Hillary Clinton email controversy: In March 2015, it became publicly known that Hillary Clinton, during her tenure as United States Secretary of State, had used her family's private email server for official communications, rather than official State Department email accounts maintained on federal secure servers. Hillary Clinton's tenure as Secretary of State: Hillary Clinton served as the 67th United States Secretary of State, under President Barack Obama, from 2009 to 2013, overseeing the department that conducted the Foreign policy of Barack Obama.
67th