A Republican lawmaker is sounding off on his Democratic challenger for accepting wads of “dark money” through a fellowship despite railing against anonymous donations in the political system.

“A new bombshell investigative report from the Washington Examiner discovered radical Democrat Will Rollins lined his own pockets with tens of thousands of dollars from liberal dark money groups, Rep. Ken Calvert (R-CA), who is facing a repeat challenge in California’s 41st Congressional District from former federal prosecutor Will Rollins, posted on social media Wednesday. “Even worse? Rollins previously said he wants to end dark money in politics.”