The pro-Trump interest group that ran an ad attacking former FBI director James Comey during his recent Senate testimony is now launching a $400,000 ad buy questioning the impartiality of Robert Mueller, the special counsel overseeing the Justice Department’s investigation into the Trump campaign’s ties with Russia.

Great America Alliance’s ad, titled “Witch Hunt,” features right-wing commentator Tomi Lahren (who now works for the group) calling the investigation a “rigged game” started by “leaker James Comey.” Lahren announces that some of the attorneys working with Mueller on the investigation have donated to Democrats, but fails to mention that a member of the legal team has also donated to Republicans, and that Mueller himself is a registered Republican.

We wrote earlier this month that while we don’t yet know who’s behind the Great America Alliance, in a previous iteration the organization was funded by groups tied to the Corkery family, wealthy conservative donors who most notably have paid for efforts to confirm Republican judicial nominees and block Democratic ones.