WASHINGTON - U.S. Attorney General Jeff Sessions on Thursday defended his decision not to appoint a second special prosecutor to investigate Republicans’ concerns about the FBI by noting that Special Counsel Robert Mueller’s Russia probe had already taken on “a life of its own.” U.S. Attorney General Jeff Sessions testifies before a Senate Appropriations Commerce, Justice, Science, and Related Agencies Subcommittee hearing on the proposed budget estimates for the Justice Department, on Capitol Hill in Washington, U.S., April 25, 2018. REUTERS/Yuri Gripas Speaking to a U.S. House appropriations panel during a routine budget hearing, Sessions told lawmakers that the Justice...