why do you believe intelligence agencies believe they know who did this? >> one thing they can do is read this 13-page report in the homeland security, the fbi, which has a lot of technical data showing exactly how they say the gru and the fsb broke into the dnc, the democratic national committee, beginning in 2015. it shows you the malware code, the so-called signatures they used to get into these systems. look, if you don't want to believe this and you don't believe -- it doesn't matter what proof is shown to you, but the russians have asked for this, donald trump has asked for this, the people around him have asked for this proof. this document is pretty useful. i know experts who spent the night poring over this document, looking at the ip addresses and all the technical data.