call him in and he probably won't answer. he hasn't been charged with anything yet. anything he does say might be used by the prosecutors against him. no one is saying he committed a crime. but he is vulnerable when he is under oath and they're asking him questions about his own financial documents. >> shannon: let's listen in. richard burr the republican and chairman of senate intelligence committee. >> our elections is a significant threat, the purpose of today's hearing is to review and highlight the extent -- to the extent possible the ranges of threats that we face as a nation. the national security threat picture has evolved significantly since 1995. what used to be a collection of mostly physical and state-based national security concerns has been replaced by something all together different. today our traditional focus on countries like north korea, russia and iran is complicated by new challenges like strategic threats posed by