Republican presidential candidate Ben Carson is facing new questions about his foreign policy capabilities.
One of Carson's closest advisers tells The Associated Press that the candidate is working in intense briefing sessions with former State Department and military officials.
But Armstrong Williams concedes the retired neurosurgeon sometimes struggles to explain foreign affairs on the campaign trail.
The New York Times on Tuesday published a story quoting one of Carson's advisers saying the candidate has trouble grasping the complexities of the Middle East.
Former CIA agent Duane Clarridge told the newspaper Carson needs briefings so "we can make him smart."
The Carson campaign hit back at Clarridge, describing him as "an elderly gentleman" who is not, in fact, among Carson's inner circle.
Bill Barrow, The Associated Press