Bill Clinton, Hillary Rodham Clinton

Former U.S. President Bill Clinton, center right, and his wife former Secretary of State Hillary Rodham Clinton, center left, walk away after they attended their daughter Chelsea’s Oxford University graduation ceremony held at the Sheldonian Theatre in Oxford, England, Saturday, May 10, 2014. Chelsea Clinton received her doctorate degree in international relations on Saturday from the prestigious British university. Her father was a Rhodes scholar at Oxford from 1968 to 1970. The graduation ceremony comes as her mother is considering a potential 2016 presidential campaign. (AP Photo/Matt Dunham)