>> again, without preempting the report, that's classical tradecraft that the russians have long, long used to -- particularly when they're promulgating so-called disinformation, they'll often try to hide the source of that, or mask it to deliberately mask the source. >> let me just ask one more time, in this situation, though, was there attempts to mask their involvement very elaborate and very, very sophisticated, or just enough to have plausible deniability? >> sir, i would rather not get into that. that kind of edges into the sources and methods, and i would rather not speak to that publicly. >> fair enough.