washington friend former fbi director jam comey say tuesday turn fbi memos comey conversations president donald trump msnbc report say friend columbia law school professor daniel richman confirm nbc news turn comey memos possession fbi comey fire trump last month say congressional testimony last week give memo describe conversations trump close friend tell share content reporter msnbc say richman also say robert mueller special counsel lead inquiry possible link 2016 trump campaign russia touch senate judiciary committee discuss panel get access memos msnbc report come u.s. attorney general jeff sessions appear capitol hill high-profile public session lawmakers answer question deal russian officials sessions senior member trump administration catch controversy whether associate president collude russia help trump win election attention washington turn whether trump might seek fire mueller former fbi director name last month justice department head federal probe russia issue deputy attorney general rod rosenstein would responsible carry dismissal tell different congressional panel tuesday would fire mueller without good cause see cause sessions appear intelligence committee five days comey trump fire may tell panel trump oust undermine agency investigation russia matter comey 's friend say 's turn comey 's trump memos fbi msnbc