NEW : Benghazi adviser blasts `` the prism of politics '' around Benghazi . `` `` The American people hold all of us accountable who are in responsibility . presidential race has now started , '' senator says . Benghazi committee finds Senate attack was likely preventable . Democratic blast Clinton in addendum to report ; committee leader calls that unfair .
NEW : Clinton adviser blasts `` the prism of politics '' around Benghazi . `` Sounds like the 2016 presidential race has now started , '' senator says . Senate committee finds Benghazi attack was likely preventable . Republicans blast Clinton in addendum to report ; committee leader calls that unfair .