In a letter to Senate Democrats, Mukasey and McConnell reiterated their stance that a media shield law could harm national security and encourage more leaks of classified information.
The "Free Flow of Information Act," proposed by Sen. Arlen Specter, R-Pa., did not come up for a vote before lawmakers adjourned for the summer. Mukasey, McConnell, Homeland Security Secretary Michael Chertoff and Defense Secretary Robert Gates have spoken out against the bill.
Supporters argue that confidentiality has been crucial to reporters' pursuit of important stories, and that a recent flurry of attempts to compel reporters to cough up their sources' identities is proof that the legislation is needed.
Though the shield legislation proposed in the Senate does not cover reporters who reveal classified information, Mukasey and McConnell said that's insufficient because it requires the government to jump through too many procedural hoops to investigate leaks.
The Bush administration's terrorism policies have been dogged by leaks. Newspapers reported that authorities were listening to Americans' phone calls and reading e-mails without warrants and revealed that the CIA was using prisons to hold terrorism suspects on foreign soil.