WASHINGTON — Attorney General Eric H. Holder Jr. on Tuesday sought to move past the political furor over Operation Fast and Furious, the disputed Arizona gun trafficking investigation, to the wider problem of the flow of American firearms to Mexican drug cartels — and what he portrayed as roadblocks members of Congress have thrown up to stemming that flow. In testimony before the Senate Judiciary Committee, Mr. Holder criticized a recent vote by the House of... (GunPolicy.org)