The now despised here Mark Levin was the first to bring this up.
Levin also claimed that the Mueller investigation was diverting law enforcement resources, with the implication that the NYC attack could have been stopped if the witch hunt was not going on. However, I would have to see proof that actual counter-terrorism resources were being diverted for the witch hunt. Otherwise, this assertion smacks of a cheap shot, right down there with the hack Richard Cohen implying that the Republican Congress’ investigations of Clinton distracted Clinton from preventing 9-11.