Four top operatives on North Carolina Lt. Gov. Mark Robinson’s campaign have stepped down, the campaign announced on Sunday.

North Carolina Lt. Gov. Mark Robinson avoided directly weighing in during a gubernatorial campaign event Saturday on a CNN report outlining evidence that he made disturbing posts on a pornography website’s message board more than a decade ago.

Senators in his own party expressed concern Sunday about the scathing report on North Carolina’s Republican gubernatorial nominee, Mark Robinson, acknowledging the grave allegations against Donald Trump’s preferred candidate.