well, i mean, the answer kristen holmes at the white house what have you learned? reporter: ana, this letter is the question sort of answers coming a day after bolton did itself. doesn t it? not show up for his deposition there are sometimes vald reaso s from his attorneys to these house committees. i ll read you a part of it and s, to keep advice to a president we ll get to what it means. confidential. in the letter, ambassador bolton as we learned in the clinton investigation and in the nixon national security adviser to the president and personally investigation, that involved in many of the events, confidentiality requirement meetings and conversations about evaporates when what s under which you have already received investigation is quite literally testimony as well as many criminal or impeachable conduct. relevant meetings and conversations that have not yet been discussed in testimony so one person who did testify, gordon sondland. his name comes up a lot in the far. ob