After the Saturday Night Massacre, Rodino began his committee's investigation. On October 30, 1973, the House Judiciary Committee began consideration of the possible impeachment of Richard Nixon. The initial straight party-line votes by a 21–17 margin were focused around how extensive the subpoena powers Rodino would have would be.[20]

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The committee spent eight months gathering evidence and pushed Nixon to comply with a subpoena for conversations taped in the Oval Office.[62] Its quarters were in the old Congressional Hotel,[60] which had become the O'Neill House Office Building. Security guards patrolled the halls and the work was done in rooms with closed blinds.[19]