The State Department undersecretary says he plans to meet personally with Barack Obama's staff, after a spokesman revealed three contract employees looked at the Illinois senator's passport file.
Spokesman Sean McCormack says it appears it was nothing more than "imprudent curiosity." Still, the department is investigating whether there were any political motivations.
Two of the employees have been fired and the third was disciplined.
Obama's campaign is calling it "an outrageous breach of security and privacy" and is demanding a full investigation. Undersecretary Patrick Kennedy says at the office's request he will provide a personal briefing for the Democrat's staff.