In Justice Department briefs and in private meetings, the Secret Service insisted that the failure to recognize the  would result in profound and predictable peril to the president, could mean the difference between life or death, would endanger the integrity of our national security, etc.
All Justice Department briefs and private meetings were attended by Secret Service.
mnli hypothesis: All Justice Department briefs and private meetings were attended by Secret Service. premise: In Justice Department briefs and in private meetings, the Secret Service insisted that the failure to recognize the  would result in profound and predictable peril to the president, could mean the difference between life or death, would endanger the integrity of our national security, etc.