so cain should've declared herself emperor?
In war, even in modern times, the United States (today's equivalent of the Roman Empire) constitutionally concentrates power in the executive vs. diffusing it. Furthermore, there's a reason why Obama won't investigate any torture with the previous administration while morally condemning it. As the President, he understand even if you find it morally reprehensible and do not engage in it yourself, an executive should be immune from prosecution in order to exercise the full extent of power when at war. It was found constitutional for FDR to intern 100,000 of US's own citizens based on ethnicity.
Someone as tactically competent as Cain made the right call by consolidating power and preventing mutiny.