Larry C. Johnson, a former CIA official and State counterterrorism official, said the same thing that happened to Mr. Ferguson happened to Benghaziinvestigators.

“It’s part of the ‘protect Hillary’ deal. That’s what’s going on,” Mr. Johnson said. “But she’s definitely culpable. The security at the annex and so-called consulate was the responsibility of the State Department. Libya was one of the top five foreign policy priorities for the Obama administration and Hillary Clinton. She didn’t do anything. That’s the point.”