On July 24, 2016, CNN's Jake Tapper asked Donald Trump Jr. about Mook’s allegations:

TAPPER: I asked [Mook] about the DNC leak, and he suggested that experts are saying that Russians were behind both the leak, the hacking of the DNC emails and their release. He seemed to be suggesting that this is part of a plot to help Donald Trump and hurt Hillary Clinton. Your response.

TRUMP JR: It just goes to show you their exact moral compass. I mean, they’ll say anything to be able to win this. I mean, this is time and time again, lie after lie. You notice, he won't say, 'well I say this.' We hear experts. His house cat at home once said that this is what's happening with the Russians. It's disgusting. It's so phony.