In the latest assault on the McNulty memo, a bipartisan group of 32 former U.S. Attorneys has written a letter to the chairman of the Senate Judiciary Committee, asking him to hold a vote on a bill that would shore up attorney-client privilege for corporations.

The letter to Sen. Patrick Leahy, D-Vt., marks the first time a group of the Justice Department’s own have panned the memo, which allows federal prosecutors to pressure, and in some circumstance force, corporations to waive their privilege, usually in return for leniency.