Washington (CNN) Former Trump campaign adviser George Papadopoulos says he doesn't remember telling anyone on the campaign that Russia had damaging emails about Hillary Clinton, but "can't guarantee" that he kept the bombshell from his campaign colleagues.

Breaking his silence for the first time since his guilty plea, Papadopoulos also doubled down on the claim that then-Sen. Jeff Sessions embraced his proposal that candidate Donald Trump meet with Russian President Vladimir Putin, contradicting Sessions' testimony to Congress.

The young political operative maintains that he never alerted the Trump campaign about the Russian dirt. But when pressed, Papadopoulos refused to completely shut the door on the possibility that the information made its way to other people on the campaign.

"As far as I remember, I absolutely did not share this information with anyone on the campaign," Papadopoulos said, adding, "I might have, but I have no recollection of doing so. I can't guarantee. All I can say is, my memory is telling me that I never shared it with anyone on the campaign."

CNN's Jake Tapper sat down exclusively with the former Trump campaign aide, who pleaded guilty last year to lying to investigators about his contacts with Russians during the 2016 presidential campaign. "The Mysterious Case of George Papadopoulos" airs Friday at 11 p.m. ET.

Read More