The conservative group Citizens United filed a lawsuit Thursday demanding access to emails Chelsea Clinton exchanged with five top aides to her mother, Democratic presidential candidate Hillary Clinton, while she served as secretary of state. The Freedom of Information Act suit, filed in U.S. District Court in Washington, also seeks emails in State Department files from three other key figures in the Clinton orbit: Clinton Foundation foreign policy chief Amitabh Desai, aide to President Bill Clinton Justin Cooper, and manager of the Clinton's Chappaqua, N.Y. home, Oscar Flores. Citizens United President David Bossie said that the group wants Chelsea Clinton's...