House Oversight Committee Chairman Darrell Issa (R-Calif.) threatened Tuesday to hold Attorney General Eric Holder in contempt of Congress if the Justice Department did not provide certain documents in response to the committee’s subpoena.

In a letter to Holder, Issa wrote that “this committee will have no alternative but to move forward with proceedings to hold you in contempt of Congress” if Holder and the DOJ didn’t produce documents they demanded relating to the Fast and Furious gun-walking scandal.