President Trump is taking up a common refrain of his allies who are critical of special counsel Robert Mueller’s Russia-focused probe: Investigate the investigators.

Trump on Monday morning added extra emphasis to the refrain, tweeting about Mueller, 2016 Democratic rival Hillary Clinton and others, “Mueller, and the A.G. based on Mueller findings (and great intelligence), have already ruled No Collusion, No Obstruction. These were crimes committed by Crooked Hillary, the DNC, Dirty Cops and others! INVESTIGATE THE INVESTIGATORS!