Dianne Feinstein says Russian leader should offer clear explanation . She also calls for a full investigation into the hacking of Democratic Party emails and possible ties to Russia. ( CNN ) -- Ukrainian government , pro-Russian rebels trade accusations over who is responsible .
Dianne Feinstein says Russian leader should offer clear explanation . She also calls for a full investigation into the hacking of Democratic Party emails and possible ties to Russia. Ukrainian government , pro-Russian rebels trade accusations over who is responsible .