Oklahoma Republican Sen. James Inhofe is demanding that Attorney General Eric Holder resign over Operation Fast and Furious, insisting that Holder must have been aware of the controversial federal gunrunning sting that backfired in deadly fashion.

“You can’t tell me that if his deputy attorney general, his deputy chief of staff, his assistant attorney general — that they were all aware of this and that he was not,” Inhofe said during an interview with the Daily Caller on Wednesday. “Something as high-profile as this operation, he would’ve known about it, and so he’d have to be lying.”