WATCH: Trump adviser David Bossie stuns Fox News host by copping to a 'vast right-wing conspiracy' against the Clintons

Appearing on Fox News Sunday, the former deputy campaign manager of Donald Trump's 2016 presidential run admitted that conservatives engaged in a "vast right-wing conspiracy" to undermine the Clintons just as former Secretary of State Hillary Clinton charged.

Speaking with host Chris Wallace, Bossie was describing Trump's enemies when he made the admission.

"There is a vast left-wing conspiracy that has been going on since the president [Trump] won this election," Bossie insisted. "All throughout the transition and through his first two years."

"A vast left-wing conspiracy, similar to what Hillary Clinton used about a right-wing conspiracy," he added as host Wallace interrupted him by saying, "Which incidentally didn't turn out to be true."

"No, it was true," Bossie corrected the Fox News host. "Chris, there was an effort by the conservative movement to undermine President Clinton."

David Bossie, it should be noted, was behind the Citizens United case, which was based on a movie attacking Hillary Clinton.

You can watch the video below via Twitter: