Jerome Corsi, a conservative conspiracy theorist associated with Roger Stone, declined to comment on the recent revelation of his cooperation with the Mueller investigation.
Mueller's investigators have reportedly spent months investigating whether Corsi had advance knowledge that WikiLeaks would be publishing emails from the private account of Hillary Clinton's campaign chairman John Podesta, and shared that knowledge with Roger Stone, described as an "associate" of then-candidate Donald Trump.
"My friend Dr. Corsi has been under a tremendous amount of pressure and it is beginning to affect him profoundly", Stone said in a text message in light of Corsi's plea talks.
Last week, Corsi said on a YouTube video that he expected to be charged with lying to federal investigators after plea talks with the special prosecutor's office broke down. Stone told the Post in October that Corsi met with Trump in 2016 and that Mueller seemed interested in those meetings.
In an interview Friday on radio station WBEN with former Trump campaign aide Michael Caputo Stone said he wasn't aware of any efforts by Corsi to strike a plea agreement and said he didn't think Corsi would lie. It's unclear what Corsi might plead guilty to, though he previously said he expected to be indicated for allegedly lying to the investigators in the ongoing Russian Federation probe.More news: American killed by Sentinelese tribe on restricted Andaman island
During the 2016 campaign, Stone publicly bragged about having "backchannel communications" with WikiLeaks founder Julian Assange, and on several occasions appeared to predict the WikiLeaks releases that roiled the race in the final stretch of the campaign.
The special counsel is scrutinizing whether Corsi and Stone coordinated with WikiLeaks ahead of its mass releases of Podesta's emails.
Corsi would join a growing list of Republican political operatives and Trump advisers who face criminal charges and have been helping Mueller's investigators.
In response to the claim from Stone that Corsi is only being "pressured" to say harmful things about him, Deutch said he wasn't surprised Stone would say that. Mueller has brought such cases against four others, including former national security adviser Michael Flynn.