this weekend as donald trump took to twitter to say was this the leaker of fake news? donald trump taking to twitter to suggest that outgoing cia director john brennan leaked unsubstantiated personal and financial information that could be damaging to trump. >> there is no basis for mr. trump to point fingers at the intelligence community for leaking information that was already available publicly. >> reporter: trump's charge coming hours after brennan appeared on national television, arguing the president elect doesn't understand the critical threat russia poses. >> i think he has to recognize that his words do have impact and they can have very positive impact or they can be undercutting of our national security. >> reporter: trump has spent months doubting u.s. intelligence findings that russia was behind the cyber attacks and the president elect suggesting the u.s. could ease tensions with russia. trump telling the times of london and a german newspaper