13 Russian nationals charged in Mueller investigation

FILE - In this Oct. 28, 2013, file photo, former FBI Director Robert Mueller is seated before President Barack Obama and FBI Director James Comey arrive at an installation ceremony at FBI Headquarters in Washington. A veteran FBI counterintelligence agent was removed from special counsel Robert Mueller's team investigating Russian election meddling after the discovery of an exchange of text messages seen as potentially anti-President Donald Trump, a person familiar with the matter said Saturday, Dec. 2, 2017. (AP Photo/Charles Dharapak, File)