The Department of Justice told Republican House leadership in a Tuesday letter that it hopes to reach an agreement with congressional overseers on how much information about Operation Fast and Furious it is required to hand over. Congressional Republicans have threatened to hold Attorney General Eric Holder in contempt of Congress for not fully complying with a 22-part subpoena served last October. The letter comes amid reports that House oversight committee chairman Rep. Darrell Issa has obtained evidence proving that senior Justice Department officials approved Operation Fast and Furious gunwalking tactics. The Justice Department letter was in response to a...