recently he's withholding judgment until he gets briefed, which will happen this week. let's get more on this with pamela brown and bob baer. pamela, first to you. this exclusive reporting on cnn that these digital fingerprints. what does this mean? >> this is another piece of evidence, new evidence, that is bolstering confidence among u.s. intelligence officials that russia is to blame for the election hack. essentially through an analysis of data of documents, officials were able to trace the hack to specific keyboards with text. the russian alphabet on the keyboard. they believe these keyboards were used to make the malware code that was used in the hacks during the election. and as one official said, though, this is just one piece of evidence. there are many pieces of the puzzle that the u.s. intelligence community has looked at in making the determination and giving them the high level of confidence